NCBI nr database

[Pol8]

Hi,

I'm downloading the nr NCBI database. So I'll have my 28 folders. I decompress them.
Then, how can I launch a blastx against all the folders?

Thanks

[westerman]

I presume you are downloading nr.00 through nr.28 thus 29 files. You should not end up with folders. Rather you will end up with a bunch of files. From the very top of the README:

. Quick Start
* Get all numbered files for a database with the same base name:
Each of these files represents a subset (volume) of that database,
and all of them are needed to reconstitute the database.
* After extraction, there is no need to concatenate the resulting files:
Call the database with the base name, for nr database files, use "-db nr".