Basic Local Alignment Search Tool 2.2.26

A set of similarity search programs.
Basic Local Alignment Search Tool is in short BLAST is a set of similarity search programs designed to explore all of the available sequence databases regardless of whether the query is protein or DNA.

It uses a heuristic algorithm which seeks local as opposed to global alignments, and is therefore able to detect relationships among sequences which share only isolated regions of similarity.

It can be run locally as a full executable, and can be used to run BLAST searches against private, local databases, or downloaded copies of the NCBI databases. It runs on Mac OS, Win32, LINUX, Solaris, IBM AIX, SGI, Compaq OSF, and HP- UX systems.

last updated on:
March 6th, 2012, 8:46 GMT
license type:
Open Software License 
developed by:
National Center for Biology Information
ROOT \ Utilities
Basic Local Alignment Search Tool
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What's New in version 2.2.25
  • Improvements:
  • Enhanced documentation, includes simplified setup instructions, available at
  • Added support for hard-masking of BLAST databases.
  • Improve performance of makeblastdb for FASTA input with large numbers of sequences, improve error checking.
read full changelog

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