github.com/biogo/biogo@v1.0.4/align/matrix/matrices/PAM500 (about)

     1  #
     2  # This matrix was produced by "pam" Version 1.0.6 [28-Jul-93]
     3  #
     4  # PAM 500 substitution matrix, scale = ln(2)/7 = 0.0990210
     5  #
     6  # Expected score = -0.401, Entropy = 0.0803 bits
     7  #
     8  # Lowest score = -9, Highest score = 34
     9  #
    10     A  R  N  D  C  Q  E  G  H  I  L  K  M  F  P  S  T  W  Y  V  B  Z  X  *
    11  A  1 -1  0  1 -2  0  1  1  0  0 -1  0 -1 -3  1  1  1 -6 -3  0  1  0  0 -9
    12  R -1  5  1  0 -4  2  0 -1  2 -2 -2  4  0 -4  0  0  0  4 -4 -2  0  1  0 -9
    13  N  0  1  1  2 -3  1  1  1  1 -1 -2  1 -1 -4  0  1  0 -5 -3 -1  1  1  0 -9
    14  D  1  0  2  3 -5  2  3  1  1 -2 -3  1 -2 -5  0  1  0 -7 -5 -1  2  2  0 -9
    15  C -2 -4 -3 -5 22 -5 -5 -3 -4 -2 -6 -5 -5 -3 -2  0 -2 -9  2 -2 -4 -5 -2 -9
    16  Q  0  2  1  2 -5  2  2  0  2 -1 -2  1 -1 -4  1  0  0 -5 -4 -1  2  2  0 -9
    17  E  1  0  1  3 -5  2  3  1  1 -2 -3  1 -1 -5  0  1  0 -7 -5 -1  2  2  0 -9
    18  G  1 -1  1  1 -3  0  1  4 -1 -2 -3  0 -2 -5  1  1  1 -8 -5 -1  1  1  0 -9
    19  H  0  2  1  1 -4  2  1 -1  4 -2 -2  1 -1 -2  0  0  0 -2  0 -2  1  2  0 -9
    20  I  0 -2 -1 -2 -2 -1 -2 -2 -2  3  4 -2  3  2 -1 -1  0 -5  0  3 -2 -2  0 -9
    21  L -1 -2 -2 -3 -6 -2 -3 -3 -2  4  7 -2  4  4 -2 -2 -1 -1  1  3 -3 -2 -1 -9
    22  K  0  4  1  1 -5  1  1  0  1 -2 -2  4  0 -5  0  0  0 -3 -5 -2  1  1  0 -9
    23  M -1  0 -1 -2 -5 -1 -1 -2 -1  3  4  0  4  1 -1 -1  0 -4 -1  2 -1 -1  0 -9
    24  F -3 -4 -4 -5 -3 -4 -5 -5 -2  2  4 -5  1 13 -4 -3 -3  3 13  0 -4 -5 -2 -9
    25  P  1  0  0  0 -2  1  0  1  0 -1 -2  0 -1 -4  4  1  1 -6 -5 -1  0  1  0 -9
    26  S  1  0  1  1  0  0  1  1  0 -1 -2  0 -1 -3  1  1  1 -3 -3 -1  1  0  0 -9
    27  T  1  0  0  0 -2  0  0  1  0  0 -1  0  0 -3  1  1  1 -6 -3  0  0  0  0 -9
    28  W -6  4 -5 -7 -9 -5 -7 -8 -2 -5 -1 -3 -4  3 -6 -3 -6 34  2 -6 -6 -6 -4 -9
    29  Y -3 -4 -3 -5  2 -4 -5 -5  0  0  1 -5 -1 13 -5 -3 -3  2 15 -1 -4 -4 -2 -9
    30  V  0 -2 -1 -1 -2 -1 -1 -1 -2  3  3 -2  2  0 -1 -1  0 -6 -1  3 -1 -1  0 -9
    31  B  1  0  1  2 -4  2  2  1  1 -2 -3  1 -1 -4  0  1  0 -6 -4 -1  2  2  0 -9
    32  Z  0  1  1  2 -5  2  2  1  2 -2 -2  1 -1 -5  1  0  0 -6 -4 -1  2  2  0 -9
    33  X  0  0  0  0 -2  0  0  0  0  0 -1  0  0 -2  0  0  0 -4 -2  0  0  0  0 -9
    34  * -9 -9 -9 -9 -9 -9 -9 -9 -9 -9 -9 -9 -9 -9 -9 -9 -9 -9 -9 -9 -9 -9 -9  1