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. BLAST can be used to infer functional and evolutionary relationships between sequences as well as help identify members of gene families.

Basic Search - using default BLAST parameter settings

Enter query sequences here in FASTA format

Or upload sequence fasta file:


And/or upload sequence fasta file:


Advanced Search - setting your favorite parameters below