IMPALA: matching a protein sequence against a collection of PSI-BLAST-constructed position-specific score matrices!!!

Availability: The IMPALA source code, the wolf1187 database, and the
aravind105 database are freely available from the NCBI ftp site
ncbi.nlm.nih.gov. The databases may be found in the subdirectory
ftp://ncbi.nlm.nih.gov/pub/impala. The source code is in
ftp://ncbi.nlm.nih.gov/toolbox/ncbi˙tools. Some IMPALA executables for
different implementations of UNIX are in ftp://ncbi.nlm.nih.gov/blast/executables.
IMPALA has been added as a search option on the Blocks Database Server
(http://blocks.fhcrc.org/blocks/impala.html)using a library of PSSMs
derived from the BLOCKS database.