Let's join us and learn how to decode the nucleotide sequence.

First please go to the homepage of BLAST.  Many kinds of blast are listed here.  Then Search for nucleotide blast and click the Standard nucleotide-nucleotide BLAST.

You can paste the nucleotide sequence in the space of search, and u can choose database, such as rat, drosophila (normally we use nr for human genome).  Then click blast!. 

Then Then to continue blast, click Format!.

Then a new browser which will automatically update will be opened.  Wait for a while until the search finishes, and the result will be displayed in the new browser.

When the result is displayed, see the picture of distribution carefully.  Click on the bar which makes the greatest alignment, this nucleotide sequence is most similar to the query nucleotide sequence.

In the alignment section, you can see how much your query sequence (A.) matches the sequence in the database (B.). You can click on the hyperlink for more details of the gene.