Jul 21, 2025 · 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 …

Important update The ClusteredNR database is now the default Protein BLAST database. Learn more about ClusteredNR

The NCBI provides a suite of command-line tools to run BLAST called BLAST+. This allows users to perform BLAST searches on their own server without size, volume and database restrictions.

Local alignments algorithms (such as BLAST) are most often used. A global alignment should only be used on sequences that share significant similarity over most of their extents, and then it will …

Lookup BLAST Job Request ID: Your Available BLAST jobs (Click headers to sort columns) ... Please sign in to My NCBI to see all of your recent results and to save your search strategies

Smart Blast searches a protein query against the landmark database Enter Protein Query Sequence

This title appears on all BLAST results and saved searches. Enter one or more queries in the top text box and one or more subject sequences in the lower text box. Then use the BLAST button at the bottom of …

Mar 17, 2025 · 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 …

Ye J, Coulouris G, Zaretskaya I, Cutcutache I, Rozen S, Madden TL. (2012) “Primer-BLAST: a tool to design target-specific primers for polymerase chain reaction.”

For example, choose "nucleotide blast" to search a nucleotide database using a nucleotide query. Descriptions of the search types appear to the right of the links.