BLAST Programs

BLAST against a nucleotide sequence database

blastn
Compares nucleotide query sequences against a nucleotide sequence database.
tblastn
Compares protein query sequences against six-frame translations of a nucleotide sequence database.
tblastx
Compares six-frame translations of nucleotide query sequences against six-frame translations of a nucleotide sequence database.

BLAST against a protein sequence database

blastp
Compares protein query sequences against a protein sequence database.
blastx
Compares six-frame translations of nucleotide query sequences against a protein sequence database.