BENS940104 Genetic code matrix (Benner et al., 1994)
DOSZ010103 An amino acid similarity matrix based on the THREADER force field (Dosztanyi-Torda, 2001)
GIAG010101 Residue substitutions matrix from thermo/mesophilic to psychrophilic enzymes (Gianese et al., 2001)
MIYT790101 Amino acid pair distance (Miyata et al., 1979)
OVEJ920102 Environment-specific amino acid substitution matrix for alpha residues (Overington et al., 1992)
RISJ880101 Scoring matrix (Risler et al., 1988)