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README for blast/matrices.
Last updated 09/10/12.
This directory contains matrices produced by various programs.
These matrices should be useable with BLAST and other programs.
BLAST binaries produced within the last few years store matrix information for
BLOSUM45, BLOSUM50, BLOSUM62, BLOSUM80, BLOSUM90, PAM30, PAM70, and PAM250
as part of the program and do not need external files.
The directory also contains a tar ball (pam.tar.gz) with source code to produce
the PAM matrices. The output from this program differs from the PAM matrices
in this directory. It does not produce comments and does not produce scores
for B, Z, X or *. In the near future, the NCBI plans to update this code
so as to produce comments similar to those of the PAM matrices in this
directory and also to include values for B, Z, X and *.
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