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The Nucleotide database is a collection of sequences from several sources, including GenBank, RefSeq, TPA and PDB. Genome, gene and transcript sequence data provide the foundation for biomedical research and discovery.
Select the sequence database to run searches against. No BLAST database contains all the sequences at NCBI. BLAST databases are organized by informational content (nr, RefSeq, etc.) or by sequencing technique (WGS, EST, etc.). more...
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The Basic Local Alignment Search Tool (BLAST) finds regions of local similarity between sequences. The program compares nucleotide or protein sequences to sequence databases and calculates the statistical significance of matches.
Search GenBank for sequence identifiers and annotations with Entrez Nucleotide. Search and align GenBank sequences to a query sequence using BLAST (Basic Local Alignment Search Tool). See BLAST info for more information about the numerous BLAST databases. Search, link, and download sequences programatically using NCBI e-utilities.
RefSeq: NCBI Reference Sequence Database. A comprehensive, integrated, non-redundant, well-annotated set of reference sequences including genomic, transcript, and protein.
Nucleotide. Search database ... Follow NCBI. Connect with NLM. National Library of Medicine 8600 Rockville Pike Bethesda, MD 20894. Web Policies FOIA HHS Vulnerability Disclosure. Help Accessibility Careers. NLM; NIH; HHS; USA.gov ...
Gene. Gene integrates information from a wide range of species. A record may include nomenclature, Reference Sequences (RefSeqs), maps, pathways, variations, phenotypes, and links to genome-, phenotype-, and locus-specific resources worldwide.
You can use your own sequences including nucleotide accessions, genome assembly accessions (such as GCF_000001635.27) or FASTA sequences as a search database. A maximum of 20 assembly accessions are allowed.
Use ORF finder to search newly sequenced DNA for potential protein encoding segments, verify predicted protein using newly developed SMART BLAST or regular BLASTP. This web version of the ORF finder is limited to the subrange of the query sequence up to 50 kb long.