[Message of the day]

 Click here for a description of the BLAST queueing system

     Choose program to use and database to search:

     Program Database
                 Perform ungapped alignment


The query sequence is filtered for low complexity regions by default.
Enter here your input data as

Please read about FASTA format description

View results in a separate window.
Click here to retrieve results if you already have a request ID.

Advanced options for the BLAST server:


      Choose an organism from the list to limit your BLAST search:
      or enter your organism name or taxonomic class here:      
      Explore the taxonomy database at NCBI
Expect   Filter Low complexity Human repeats Mask for lookup table only
Query Genetic Codes (blastx only) 


  Matrix         Gap existence cost     Per residue gap cost    Lambda ratio     


Other advanced options:     

These items are needed only for formatting. If you wish to change them, you may do so now or when you request your results.
        NCBI-gi        Graphical Overview
  Alignment view Descriptions   Alignments
The BLAST server may be very busy during the weekday, resulting in delays for users. The email option allows a user to receive the results quickly in a convenient form. If the HTML option is used, the results should be loaded into a web browser for viewing.

   Send reply to the Email address:          In HTML format


Comments and suggestions to:< blast-help@ncbi.nlm.nih.gov >