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The GenBank sequence database is an open access, annotated collection of all publicly available nucleotide sequences and their protein translations. It is produced and maintained by the National Center for Biotechnology Information (NCBI; a part of the National Institutes of Health in the United States) as part of the International Nucleotide Sequence Database Collaboration (INSDC).
GenBank (National Center for Biotechnology Information) DDBJ (Japan), GenBank (USA) and European Nucleotide Archive (Europe) are repositories for nucleotide sequence data from all organisms. All three accept nucleotide sequence submissions, and then exchange new and updated data on a daily basis to achieve optimal synchronisation between them.
An essential component of a submission to dbSNP is an unambiguous location for the variation being submitted. dbSNP now minimally requires that you submit variant location as an asserted position on RefSeq or INSDC sequences.
The NCBI assigns a unique identifier (taxonomy ID number) to each species of organism. [5] The NCBI has software tools that are available through internet browsers or by FTP. For example, BLAST is a sequence similarity searching program. BLAST can do sequence comparisons against the GenBank DNA database in less than 15 seconds.
The syntax is called INSDSeq and its core consists of the letter sequence of the gene expression (amino acid sequence) and the letter sequence for nucleotide bases in the gene or decoded segment. In a DBFetch operation shows a typical INSD entry at the EMBL-EBI database; [6] the same entry at NCBI. [7]
Several projects to improve RefSeq services are currently in development by the NCBI, often in collaboration with research centers such as EMBL-EBI: . Consensus CDS (CCDS): This project aims to identify a core set of human and mouse protein-coding regions and standardize sets of genes with high and consistent levels of genomic annotation quality.
There is much redundancy, as multiple labs may submit numerous sequences that are identical, or nearly identical, to others in the databases. [5] Many annotations of the sequences are based not on laboratory experiments, but on the results of sequence similarity searches for previously annotated sequences.
The NCBI is a part of the National Library of Medicine (NLM), which is itself a department of the National Institutes of Health (NIH), which in turn is a part of the United States Department of Health and Human Services. The name "Entrez" (a greeting meaning "Come in" in French) was chosen to reflect the spirit of welcoming the public to search ...
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