BLAST (N/P/X/TBLASTN)

Seed-and-extend heuristic search — k-mer neighborhood seeding, ungapped X-drop extension, gapped Smith-Waterman refinement and genuine Karlin-Altschul E-values.

When to use: Find similar sequences in a FASTA database with E-values.

Level

Intermediate

Input

Query + FASTA subjects

Output

Hits, identities, E-values

Runtime

2–10 s