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Nucleotide BLAST: Align two or more sequences using BLAST
BLASTN programs search nucleotide subjects using a nucleotide query. more...
Enter Query Sequence


Enter a descriptive title for your BLAST search [?]
Enter Subject Sequence

Choose Search Set
Database sequences non-default value [?]
Add organism

Enter organism common name, binomial, or tax id. Only 20 top taxa will be shown. [?]

Enter an Entrez query to limit search [?]
Program Selection
Choose a BLAST algorithm [?]

Choose a BLAST algorithm [?]
Search using Megablast (Optimize for highly similar sequences)
Algorithm parameters Note: Parameter values that differ from the default are highlighted in yellow and marked with sign