Search NCBI nucleotide database using a nucleotide query

BLASTN Plus (Nucleotide Blast) compares each nucleotide database sequence to the query in a separate nucleotide-nucleotide pairwise comparison.

Net-BLASTN PLUS is a variant of the BLASTN 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.