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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+ <herd>sci-biology</herd>
+ <longdescription>
+ Amino acid indices and similarity matrices maintained at Kyoto
+ University. An amino acid index is a set of 20 numerical values
+ representing any of the different physicochemical and biological
+ properties of amino acids. The AAindex1 section of the Amino Acid
+ Index Database is a collection of published indices together with the
+ result of cluster analysis using the correlation coefficient as the
+ distance between two indices. This section currently contains 494
+ indices. Another important feature of amino acids that can be
+ represented numerically is the similarity between amino acids. Thus, a
+ similarity matrix, also called a mutation matrix, is a set of 210
+ numerical values, 20 diagonal and 20x19/2 off-diagonal elements, used
+ for sequence alignments and similarity searches. The AAindex2 section
+ of the Amino Acid Index Database is a collection of published amino
+ acid mutation matrices together with the result of cluster analysis.
+ This section currently contains 83 matrices.
+ </longdescription>
+</pkgmetadata>