|« Equitrac copy cards extended through August 31||Melvin Calvin honored on U.S. stamp »|
The Nucleotide database is one of three major NCBI databases containing nucleotide sequence data. It contains sequences from the following sources:
The Nucleotide database automatically maps keyword queries to NCBI's taxonomic organism classification system, and provides a breakdown of the search results by species. Searches can be limited to a single species using the [Organism] field tag. Filters can also be applied for bacteria, INSDC/GenBank records, mRNA, and RefSeq records. Limits include date, source database, gene location, molecule and sequence types. As with other NCBI resources, My NCBI allows you to save Nucleotide searches, create e-mail alerts, and set up preferences for displaying and filtering search results.