Blast Search

Query a nucleotide or protein sequence against a database of nucleotide or protein sequences.

Note 1: BlastP and BlastX searches take a very long time to run on the database of ALL protein sequences (~1 to 2 minutes per sequence). Please consider limiting your search to a specific species if you would like to reduce the amount of time it takes.

Note 2: The Expect value (E) is a parameter that describes the number of hits one can "expect" to see by chance when searching a database of a particular size. Therefore, an E-value for a specific alignment from a single-strain database search will be different from the E-value returned from the all-strains database search.

1) Select a Blast+ program


2) Specify custom search parameters (optional)

3) Select one or more organisms to search

Include all genomes Only include complete genomes

4) Enter your sequence in FASTA format