An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Quick start guide
Quick start results guide
Guide to BLAST home and search pages
Blast report description
Frequently Asked Questions
Write to the help desk
The Statistics of Sequence Similarity Scores
Blast+ Command Line Applications User Manual
BLAST News directory
Download BLAST Software and Databases
BLAST Searches at a Cloud Provider