GenBase - Standards

Standards

Source Modifiers Required Modifiers Optional but recommended Optional Download Feature Table Locations Attributes Qualifier hints Description of each feature Download

Feature Table

The design of the feature table in xlsx format refers to the TBL in text format from NCBI. Consistent with TBL, xlsx's annotation of sequences follows the INSDC standard. Users can get tips from different feature and qualifier combinations in the table, including examples, formats and their definitions.

Locations

1) Chr.

Header of each sequence, starting with the Feature field

2) Start and end.

Start and end coordinates of each feature in the sequence

Coordinate should be a value of integer type

If the end is greater than the starting coordinate, the feature is considered to be located in the reverse strand of the sequence

3) Completeness

Whether the feature is complete. For example, if it is a coding gene, all CDS features of the gene should be divided by 3.

If incomplete, mark the incomplete direction, 5 ', 3', or both ends.

Attributes

1) Feature

Name of feature within the coordinate range.

All available features are listed in the drop-down box.

For the feature name within the coordinate range, we suggest that each coding locus should have [gene] features as the basic unit, even if the feature can be omitted in some cases.

If the feature has more than one qualifier, the feature column should be empty when these qualifiers are listed under the feature, which indicates that these qualifiers belong to the same feature block.

2) Qualifier

Annotations for multiple dimensions of the feature

All available qualifiers of this feature are listed in the drop-down box after selecting the corresponding feature.

We hope you can describe the characteristics of this locus in as much detail as possible, even though this position can sometimes be omitted.

When there is more than one qualifier, all qualifiers should be listed below the line declaring the feature, and the feature column on the left should be empty.

3) Qualifier value

After declaring the corresponding qualifier, the user should fill in the specific contents of the qualifier

The user can be prompted in qualifier hints for the filling specification and definition of this value.

Qualifier hints

1) Type and example

For each qualifier, qualifier hints give written suggestions including examples, formats and definitions according to the INSDC standard.

[Qualifier hints] are only used for type hints. No matter what its content is, it will not affect the format verification and conversion of xlsx

Description of each feature

1) 3'UTR

Definition	Feature	Qualifiers	Type	Comment
1) region at the 3' end of a mature transcript (following the stop codon) that is not translated into a protein; 2) region at the 3' end of an RNA virus (following the last stop codon) that is not translated into a protein;	3'UTR	allele	text	NA
		citation	[number]
		db_xref	:
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		standard_name	text
		trans_splicing	boolean

2) 5'UTR

Definition	Feature	Qualifiers	Type	Comment
1) region at the 5' end of a mature transcript (preceding the initiation codon) that is not translated into a protein; 2) region at the 5' end of an RNA virus genome (preceding the first initiation codon) that is not translated into a protein;	5'UTR	allele	text	NA
		citation	[number]
		db_xref	:
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		standard_name	text
		trans_splicing	boolean

3) CDS

Definition	Feature	Qualifiers	Type	Comment
coding sequence; sequence of nucleotides that corresponds with the sequence of amino acids in a protein (location includes stop codon); feature includes amino acid conceptual translation.	CDS	artificial_location	[artificial_location_value]	/codon_start has valid value of 1 or 2 or 3, indicating the offset at which the first complete codon of a coding feature can be found, relative to the first base of that feature; /transl_table defines the genetic code table used if other than the universal genetic code table; genetic code exceptions outside the range of the specified tables is reported in /transl_except qualifier; /protein_id consists of a stable ID portion (from the end of 2018 new accessions may be extended to a 3+7 accession format with 3 position letters and 7 numbers; existing data before the end of 2018 uses a 3+5 format) plus a version number after the decimal point; when the protein sequence encoded by the CDS changes, only the version number of the /protein_id value is incremented; the stable part of the /protein_id remains unchanged and as a result will permanently be associated with a given protein;
		circular_RNA	boolean
		citation	[number]
		codon_start	<1 or 2 or 3>
		db_xref	<database>:<identifier>
		EC_number	text
		exception	[exception_value]
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		number	unquoted text (single token)
		old_locus_tag	text (single token)
		operon	text
		product	text
		protein_id
		pseudo	boolean
		pseudogene	TYPE
		ribosomal_slippage	boolean
		standard_name	text
		translation	text
		transl_except	(pos:<location>,aa:<amino_acid>)
		transl_table	<integer>
		trans_splicing	boolean

4) C_region

Definition	Feature	Qualifiers	Type	Comment
constant region of immunoglobulin light and heavy chains, and T-cell receptor alpha, beta, and gamma chains; includes one or more exons depending on the particular chain	C_region	allele	text	NA
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		product	text
		pseudo	boolean
		pseudogene	TYPE
		standard_name	text

5) D-loop

Definition	Feature	Qualifiers	Type	Comment
displacement loop; a region within mitochondrial DNA in which a short stretch of RNA is paired with one strand of DNA, displacing the original partner DNA strand in this region; also used to describe the displacement of a region of one strand of duplex DNA by a single stranded invader in the reaction catalyzed by RecA protein	D-loop	allele	text	NA
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)

6) D_segment

Definition	Feature	Qualifiers	Type	Comment
Diversity segment of immunoglobulin heavy chain, and T-cell receptor beta chain;	D_segment	allele	text	NA
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		product	text
		pseudo	text
		pseudogene	TYPE
		standard_name	text

7) J_segment

Definition	Feature	Qualifiers	Type	Comment
joining segment of immunoglobulin light and heavy chains, and T-cell receptor alpha, beta, and gamma chains;	J_segment	allele	text	NA
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		product	text
		pseudo	text
		pseudogene	TYPE
		standard_name	text

8) N_region

Definition	Feature	Qualifiers	Type	Comment
extra nucleotides inserted between rearranged immunoglobulinsegments.	N_region	allele	text	NA
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		product	text
		pseudo	text
		pseudogene	TYPE
		standard_name	text

9) STS

Definition	Feature	Qualifiers	Type	Comment
sequence tagged site; short, single-copy DNA sequence that characterizes a mapping landmark on the genome and can be detected by PCR; a region of the genome can be mapped by determining the order of a series of STSs;	STS	allele	text	STS location to include primer(s) in primer_bind key or primers.
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		standard_name	text

10) S_region

Definition	Feature	Qualifiers	Type	Comment
switch region of immunoglobulin heavy chains; involved in the rearrangement of heavy chain DNA leading to the expression of a different immunoglobulin class from the same B-cell;	S_region	allele	text	STS location to include primer(s) in primer_bind key or primers.
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		product	text
		pseudo	text
		pseudogene	TYPE
		standard_name	text

11) V_region

Definition	Feature	Qualifiers	Type	Comment
variable region of immunoglobulin light and heavy chains, and T-cell receptor alpha, beta, and gamma chains; codes for the variable amino terminal portion; can be composed of V_segments, D_segments, N_regions, and J_segments;	V_region	allele	text	STS location to include primer(s) in primer_bind key or primers.
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		product	text
		pseudo	text
		pseudogene	TYPE
		standard_name	text

12) V_segment

Definition	Feature	Qualifiers	Type	Comment
variable segment of immunoglobulin light and heavy chains, and T-cell receptor alpha, beta, and gamma chains; codes for most of the variable region (V_region) and the last few amino acids of the leader peptide;	V_segment	allele	text	STS location to include primer(s) in primer_bind key or primers.
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		product	text
		pseudo	text
		pseudogene	TYPE
		standard_name	text

13) assembly_gap

Definition	Feature	Qualifiers	Type	Comment
gap between two components of a genome or transcriptome assembly;	assembly_gap	(Mandatory) estimated_length	unknown or <integer>	the location span of the assembly_gap feature for an unknown gap has to be specified by the submitter; the specified gap length has to be reasonable (less or = 1000) and will be indicated as "n"'s in sequence. However, the value for the estimated_length of assembly_gap features within a single (non-CON) transcriptome record must be an integer and can not be "unknown";
		(Mandatory) gap_type	is "within scaffold", "repeat within scaffold" or "contamination". If there are multiple types of linkage_evidence they will appear as multiple
		(Mandatory) linkage_evidence	TYPE (Note: Mandatory only if the qualifier is invalid.)

14) centromere

Definition	Feature	Qualifiers	Type	Comment
region of biological interest identified as a centromere and which has been experimentally characterized;	centromere	citation	[number]	the centromere feature describes the interval of DNA thatcorresponds to a region where chromatids are held and a kinetochore is formed
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		note	text
		standard_name	text

15) exon

Definition	Feature	Qualifiers	Type	Comment
region of genome that codes for portion of spliced mRNA, rRNA and tRNA; may contain 5'UTR, all CDSs and 3' UTR;	exon	allele	text	STS location to include primer(s) in primer_bind key or primers.
		citation	[number]
		db_xref	<database>:<identifier>
		EC_number	text
		experiment	[CATEGORY:]text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		number	unquoted text (single token)
		old_locus_tag	text (single token)
		product	text
		pseudo	text
		pseudogene	TYPE
		standard_name	text
		trans_splicing	boolean

16) gap

Definition	Feature	Qualifiers	Type	Comment
gap in the sequence	gap	experiment	[CATEGORY:]text	the location span of the gap feature for an unknown gap is 100 bp, with the 100 bp indicated as 100 "n"'s in the sequence. Where estimated length is indicated by an integer, this is indicated by the same number of "n"'s in the sequence. No upper or lower limit is set on the size of the gap.
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		map	text
		note	text

17) gene

Definition	Feature	Qualifiers	Type	Comment
region of biological interest identified as a gene and for which a name hasbeen assigned;	gene	allele	text	the gene feature describes the interval of DNA that corresponds to a genetic trait or phenotype; the feature is, by definition, not strictly bound to it's positions at the ends; it is meant to represent a region where the gene is located.
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		operon	text
		product	text
		pseudo	text
		pseudogene	TYPE
		phenotype	text
		standard_name	text
		trans_splicing	boolean

18) iDNA

Definition	Feature	Qualifiers	Type	Comment
intervening DNA; DNA which is eliminated through any of several kinds of recombination;	iDNA	allele	text	e.g., in the somatic processing of immunoglobulin genes.
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		number	unquoted text (single token)
		old_locus_tag	text (single token)
		standard_name	text

19) intron

Definition	Feature	Qualifiers	Type	Comment
a segment of DNA that is transcribed, but removed from within the transcript by splicing together the sequences	intron	allele	text	e.g., in the somatic processing of immunoglobulin genes.
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		number	unquoted text (single token)
		old_locus_tag	text (single token)
		pseudo	text
		pseudogene	TYPE
		standard_name	text
		trans_splicing	boolean

20) mRNA

Definition	Feature	Qualifiers	Type	Comment
messenger RNA; includes 5'untranslated region (5'UTR), coding sequences(CDS, exon) and 3'untranslated region (3'UTR);	mRNA	allele	text	NA
		artificial_location	[artificial_location_value]
		circular_RNA	boolean
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		operon	text
		product	text
		pseudo	text
		pseudogene	TYPE
		standard_name	text
		trans_splicing	boolean

21) mat_peptide

Definition	Feature	Qualifiers	Type	Comment
mature peptide or protein coding sequence; coding sequence for the mature or final peptide or protein product following post-translational modification; the location does not include the stop codon (unlike the corresponding CDS);	mat_peptide	allele	text	NA
		citation	[number]
		db_xref	<database>:<identifier>
		EC_number	text
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		product	text
		pseudo	text
		pseudogene	TYPE
		standard_name	text

22) misc_RNA

Definition	Feature	Qualifiers	Type	Comment
any transcript or RNA product that cannot be defined by other RNA keys (prim_transcript, precursor_RNA, mRNA, 5'UTR, 3'UTR, exon, CDS, sig_peptide, transit_peptide, mat_peptide, intron, polyA_site, ncRNA, rRNA and tRNA);	misc_RNA	allele	text	NA
		citation	[number]
		db_xref	<database>:<identifier>
		EC_number	text
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		operon	text
		product	text
		pseudo	text
		pseudogene	TYPE
		standard_name	text
		trans_splicing	boolean

23) misc_binding

Definition	Feature	Qualifiers	Type	Comment
site in nucleic acid which covalently or non-covalently binds another moiety that cannot be described by any other binding key (primer_bind or protein_bind);	misc_binding	allele	text	note that feature key regulatory with /regulatory_class="ribosome_binding_site" should be used for ribosome binding sites.
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)

24) misc_difference

Definition	Feature	Qualifiers	Type	Comment
feature sequence is different from that presented in the entry and cannot be described by any other difference key (old_sequence, variation, or modified_base);	misc_difference	allele	text	the misc_difference feature key should be used to describe variability that arises as a result of genetic manipulation (e.g. site directed mutagenesis); use /replace="" to annotate deletion, e.g. misc_difference 412..433 /replace=""
		citation	[number]
		clone	text
		compare	[accession-number.sequence-version]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		phenotype	text
		replace	text
		standard_name	text

25) misc_feature

Definition	Feature	Qualifiers	Type	Comment
region of biological interest which cannot be described bykey; a new or rare feature;	misc_feature	allele	text	this key should not be used when the need is merely to mark a region in order to comment on it or to use it in another feature's location
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		number	unquoted text (single token)
		old_locus_tag	text (single token)
		phenotype	text
		product	text
		pseudo	text
		pseudogene	TYPE
		standard_name	text

26) misc_recomb

Definition	Feature	Qualifiers	Type	Comment
site of any generalized, site-specific or replicative recombination event where there is a breakage and reunion of duplex DNA that cannot be described by other recombination keys or qualifiers of source key (/proviral);	misc_recomb	allele	text	NA
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		recombination_class	TYPE
		standard_name	text

27) misc_structure

Definition	Feature	Qualifiers	Type	Comment
any secondary or tertiary nucleotide structure or conformation that cannot be described by other Structure keys (stem_loop and D-loop);	misc_structure	allele	text	NA
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		standard_name	text

28) mobile_element

Definition	Feature	Qualifiers	Type	Comment
region of genome containing mobile elements;	mobile_element	allele	text	NA
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		rpt_family	text
		rpt_type	text
		standard_name	text

29) modified_base

Definition	Feature	Qualifiers	Type	Comment
the indicated nucleotide is a and should be substituted for by the indicated molecule (given in the mod_base qualifier value)	modified_base	allele	text	value is limited to the restricted vocabulary for modified base abbreviations;
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		frequency	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)

30) ncRNA

Definition	Feature	Qualifiers	Type	Comment
a non-protein-coding gene, other than ribosomal RNA and transfer molecule of which is the RNA transcript;	ncRNA	allele	text	the ncRNA feature is not used for ribosomal and transfer RNA annotation, for which the rRNA and tRNA feature keys should be used, respectively;
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		operon	text
		product	text
		pseudo	text
		pseudogene	TYPE
		standard_name	text
		trans_splicing	Example
		ncRNA_class	TYPE

31) old_sequence

Definition	Feature	Qualifiers	Type	Comment
the presented sequence revises a previous version of the sequence at this location;	old_sequence	allele	text	/replace="" is used to annotate deletion, e.g. old_sequence 12..15 /replace="" NOTE: This feature key is not valid in entries/records created from 15-Oct-2007.
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		replace	text

32) operon

Definition	Feature	Qualifiers	Type	Comment
region containing transcript including a cluster of genes that are under the control of the same regulatory sequences/promoter and in the same biological pathway	operon	allele	text	NA
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		map	text
		note	text
		phenotype	text
		pseudo	boolean
		pseudogene	TYPE
		standard_name	text

33) oriT

Definition	Feature	Qualifiers	Type	Comment
origin of transfer; region of a DNA molecule where transfer is initiated during the process of conjugation or mobilization	oriT	allele	text	rep_origin should be used for origins of replication; /direction has legal values RIGHT, LEFT and BOTH, however only RIGHT and LEFT are valid when used in conjunction with the oriT feature; origins of transfer can be present in the chromosome; plasmids can contain multiple origins of transfer
		bound_moiety	text
		citation	[number]
		db_xref	<database>:<identifier>
		direction	value
		experiment	[CATEGORY:]text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		rpt_family	text
		rpt_type	<repeat_type>
		rpt_unit_range	<base_range>
		rpt_unit_seq	TYPE
		standard_name	text Molecule Scope DNA

34) polyA_site

Definition	Feature	Qualifiers	Type	Comment
site on an RNA transcript to which will be added post-transcriptional polyadenylation;	polyA_site	allele	text	NA
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)

35) precursor_RNA

Definition	Feature	Qualifiers	Type	Comment
any RNA species that is not yet the mature RNA product; may include ncRNA, rRNA, tRNA, 5' untranslated region (5'UTR), coding sequences (CDS, exon), intervening sequences (intron) and 3' untranslated region (3'UTR);	precursor_RNA	allele	text	used for RNA which may be the result of post-transcriptional processing; if the RNA in question is known not to have been processed, use the prim_transcript key.
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		operon	text
		product	text
		standard_name	text
		trans_splicing	boolean

36) prim_transcript

Definition	Feature	Qualifiers	Type	Comment
primary (initial, unprocessed) transcript; mayinclude ncRNA, rRNA, tRNA, 5' untranslated region (5'UTR), coding sequences (CDS, exon), intervening sequences (intron) and 3' untranslated region (3'UTR);	prim_transcript	allele	text	NA
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		operon	text
		standard_name	text

37) primer_bind

Definition	Feature	Qualifiers	Type	Comment
non-covalent primer binding site for initiation of transcription, or reverse transcription; includes site(s) for synthetic e.g., PCR primer elements;	primer_bind	allele	text	used to annotate the site on a given sequence to which a primer molecule binds - not intended to represent the sequence of the primer molecule itself; PCR components and reaction times may be stored under the "/PCR_conditions" qualifier; since PCR reactions most often involve pairs of primers, a single primer_bind key may use the order() operator with two locations, or a pair of primer_bind keys may be used.
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		standard_name	text
		PCR_conditions	text

38) propeptide

Definition	Feature	Qualifiers	Type	Comment
propeptide coding sequence; coding sequence for the domain of a proprotein that is cleaved to form the mature protein product.	propeptide	allele	text	NA
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		product	text
		pseudo	boolean
		pseudogene	TYPE
		standard_name	text

39) protein_bind

Definition	Feature	Qualifiers	Type	Comment
non-covalent protein binding site on nucleic acid;	protein_bind	allele	text	note that feature key regulatory with /regulatory_class="ribosome_binding_site" should be used for ribosome binding sites.
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		operon	text
		standard_name	text

40) rRNA

Definition	Feature	Qualifiers	Type	Comment
mature ribosomal RNA; RNA component of the ribonucleoprotein particle (ribosome) which assembles amino acids into proteins.	rRNA	allele	text	rRNA sizes should be annotated with the /product qualifier.
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		operon	text
		product	text
		pseudo	boolean
		pseudogene	TYPE
		standard_name	text

41) regulatory

Definition	Feature	Qualifiers	Type	Comment
any region of sequence that functions in the regulation of transcription, translation, replication or chromatin structure;	regulatory	allele	text	This feature has replaced the following Feature Keys on 15- DEC-2014: enhancer, promoter, CAAT_signal, TATA_signal, - 35_signal, -10_signal, RBS, GC_signal, polyA_signal, attenuator, terminator, misc_signal.
		bound_moiety	text
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		operon	text
		phenotype	text
		pseudo	boolean
		pseudogene	TYPE
		standard_name	text

42) repeat_region

Definition	Feature	Qualifiers	Type	Comment
region of genome containing repeating units;	repeat_region	allele	text	NA
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		rpt_family	text
		rpt_type	<repeat_type>
		rpt_unit_range	<base_range>
		rpt_unit_seq	TYPE
		satellite	<satellite_type>[:<class>][ <identifier>]
		standard_name	text

43) sig_peptide

Definition	Feature	Qualifiers	Type	Comment
signal peptide coding sequence; coding sequence for an N-terminal domain of a secreted protein; this domain is involved in attaching nascent polypeptide to the membrane leader sequence;	sig_peptide	allele	text	NA
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		product	text
		pseudo	boolean
		pseudogene	TYPE
		standard_name	text

44) source

Definition	Feature	Qualifiers	Type	Comment
identifies the biological source of the specified span of the sequence; this key is mandatory; more than one source key per sequence is allowed; every entry/record will have, as a minimum, either a single source key spanning the entire sequence or multiple source keys, which together, span the entire sequence.	source	altitude	text	transgenic sequences must have at least two source feature keys; in a transgenic sequence the source feature key describing the organism that is the recipient of the DNA must span the entire sequence; see Appendix III /organelle for a list of <organelle_value>
		bio_material	[<institution-code>:[<collection-code>:]]<material_id>
		cell_line	text
		cell_type	text
		chromosome	text
		citation	[number]
		clone	text
		clone_lib	text
		collected_by	text
		collection_date	text
		country	<country_value>[:<region>][, <locality>]
		cultivar	text
		culture_collection	<institution-code>:[<collection-code>:]<culture_id>
		db_xref	<database>:<identifier>
		dev_stage	text
		ecotype	text
		environmental_sample	boolean
		focus	boolean
		germline	boolean
		haplogroup	text
		haplotype	text
		host	text
		identified_by	text
		isolate	text
		isolation_source	text
		lab_host	text
		lat_lon	text
		macronuclear	boolean
		map	text
		mating_type	text
		metagenome_source	text
		note	text
		organelle	<organelle_value>
		PCR_primers	[fwd_name: XXX, ]fwd_seq: xxxxx, [rev_name: YYY, ]rev_seq: yyyyy
		plasmid	text
		pop_variant	text
		proviral	boolean
		rearranged	boolean
		segment	text
		serotype	text
		serovar	text
		sex	text
		specimen_voucher	[<institution-code>:[<collection-code>:]]<specimen_id>
		strain	text
		sub_clone	text
		submitter_seqid	text
		sub_species	text
		sub_strain	text
		tissue_lib	text
		tissue_type	text
		transgenic	boolean
		type_material	<type-of-type> of <organism name>
		variety	text

45) stem_loop

Definition	Feature	Qualifiers	Type	Comment
hairpin; a double-helical region formed by base-pairing between adjacent (inverted) complementary sequences in a single strand of RNA or DNA.	stem_loop	allele	text	NA
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		operon	text
		standard_name	text

46) tRNA

Definition	Feature	Qualifiers	Type	Comment
mature transfer RNA, a small RNA molecule (75-85 bases long) that mediates the translation of a nucleic acid sequence into an amino acid sequence;	tRNA	allele	text	NA
		anticodon	(pos:<location>,aa:<amino_acid>,seq:<text>)
		circular_RNA	boolean
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		operon	text
		product	text
		pseudo	boolean
		pseudogene	TYPE
		standard_name	text
		trans_splicing	text

47) telomere

Definition	Feature	Qualifiers	Type	Comment
region of biological interest identified as a telomere and which has been experimentally characterized;	telomere	citation	[number]	the telomere feature describes the interval of DNA that corresponds to a specific structure at the end of the linear eukaryotic chromosome which is required for the integrity and maintenance of the end; this region is unique compared to the rest of the chromosome and represent the physical end of the chromosome;
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		note	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		rpt_type	<repeat_type>
		rpt_unit_range	<base_range>
		rpt_unit_seq	TYPE
		standard_name	text

48) tmRNA

Definition	Feature	Qualifiers	Type	Comment
transfer messenger RNA; tmRNA acts as a tRNA first, and then as an mRNA that encodes a peptide tag; the ribosome translates this mRNA region of tmRNA and attaches the encoded peptide tag to the C-terminus of the unfinished protein; this attached tag targets the protein for destruction or proteolysis;	tmRNA	allele	text	NA
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		product	text
		pseudo	boolean
		pseudogene	TYPE
		standard_name	text
		tag_peptide	<base_range>

49) transit_peptide

Definition	Feature	Qualifiers	Type	Comment
transit peptide coding sequence; coding sequence for an N-terminal domain of a nuclear-encoded organellar protein; this domain is involved in post-translational import of the protein into the organelle;	transit_peptide	allele	text	NA
		citation	[number]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		function	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		product	text
		pseudo	boolean
		pseudogene	TYPE
		standard_name	text

50) unsure

Definition	Feature	Qualifiers	Type	Comment
a small region of sequenced bases, generally 10 or fewer in its length, which could not be confidently identified. Such a region might contain called bases (A, T, G, or C), or a mixture of called-bases and uncalled-bases ('N'). The unsure feature should not be used when annotating gaps in genome assemblies. Please refer to assembly_gap feature for gaps within the sequence of an assembled genome. For annotation of gaps in other sequences than assembled genomes use the gap feature.	unsure	allele	text	use /replace="" to annotate deletion, e.g. unsure 11..15 /replace=""
		citation	[number]
		compare	[accession-number.sequence-version]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		replace	text

51) variation

Definition	Feature	Qualifiers	Type	Comment
a related strain contains stable mutations from the same gene (e.g., RFLPs, polymorphisms, etc.) which differ from the presented sequence at this location (and possibly others);	variation	allele	text	used to describe alleles, RFLP's,and other naturally occurring mutations and polymorphisms; variability arising as a result of genetic manipulation (e.g. site directed mutagenesis) should be described with the misc_difference feature; use /replace="" to annotate deletion, e.g. variation 4..5 /replace=""
		citation	[number]
		compare	[accession-number.sequence-version]
		db_xref	<database>:<identifier>
		experiment	[CATEGORY:]text
		frequency	text
		gene	text
		gene_synonym	text
		inference	[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
		locus_tag	text (single token)
		map	text
		note	text
		old_locus_tag	text (single token)
		phenotype	text
		product	text
		replace	boolean
		standard_name	text

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Please download feature table standard file.