BLAST Search

Click here for a description of the BLAST queueing system

Choose program to use and database to search:

Program Database

To search unfinished Human Genome sequences, go to the Basic or Advanced BLAST page and choose 'htgs' from the database pull down list. Then limit your search to the organism Homo sapiens using the pull down under advanced options. To search the finished Human Genome sequences, please use the chromosome BLAST tool in the sidebar of the Human Genome Sequencing main page.

Perform ungapped alignment
Perform CDD Search (proteins only)

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.

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 >