BLASTP Plus (Protein Blast) compares each protein database sequence to the query in a separate protein-protein pairwise comparison.

Net-BLASTP PLUS is a variant of the BLASTP program intended for work with distant databases.

BLAST is a service of the National Center for Biotechnology Information (NCBI). A nucleotide or protein sequence sent to the BLAST server is compared against databases at the NCBI and a summary of matches is returned to the user.

The www BLAST server can be accessed through the home page of the NCBI at Stand-alone BLAST binaries can be obtained from the NCBI FTP site.