ncbi-blast: ncbi-blast (BLAST: Basic Local Alignment Search Tool) ncbi-blast: ncbi-blast: The Basic Local Alignment Search Tool (BLAST) finds regions of ncbi-blast: local similarity between sequences. The program compares nucleotide ncbi-blast: or protein sequences to sequence databases and calculates the ncbi-blast: statistical significance of matches. BLAST can be used to infer ncbi-blast: functional and evolutionary relationships between sequences as well ncbi-blast: as help identify members of gene families. ncbi-blast: ncbi-blast: Home: https://blast.ncbi.nlm.nih.gov/ ncbi-blast: