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

     1  # PAM 250 matrix recommended by Gonnet, Cohen & Benner
     2  # Science June 5, 1992.
     3  # Values rounded to nearest integer
     4     C  S  T  P  A  G  N  D  E  Q  H  R  K  M  I  L  V  F  Y  W  X  *
     5  C 12  0  0 -3  0 -2 -2 -3 -3 -2 -1 -2 -3 -1 -1 -2  0 -1  0 -1 -3 -8
     6  S  0  2  2  0  1  0  1  0  0  0  0  0  0 -1 -2 -2 -1 -3 -2 -3  0 -8
     7  T  0  2  2  0  1 -1  0  0  0  0  0  0  0 -1 -1 -1  0 -2 -2 -4  0 -8
     8  P -3  0  0  8  0 -2 -1 -1  0  0 -1 -1 -1 -2 -3 -2 -2 -4 -3 -5 -1 -8
     9  A  0  1  1  0  2  0  0  0  0  0 -1 -1  0 -1 -1 -1  0 -2 -2 -4  0 -8
    10  G -2  0 -1 -2  0  7  0  0 -1 -1 -1 -1 -1 -4 -4 -4 -3 -5 -4 -4 -1 -8
    11  N -2  1  0 -1  0  0  4  2  1  1  1  0  1 -2 -3 -3 -2 -3 -1 -4  0 -8
    12  D -3  0  0 -1  0  0  2  5  3  1  0  0  0 -3 -4 -4 -3 -4 -3 -5 -1 -8
    13  E -3  0  0  0  0 -1  1  3  4  2  0  0  1 -2 -3 -3 -2 -4 -3 -4 -1 -8
    14  Q -2  0  0  0  0 -1  1  1  2  3  1  2  2 -1 -2 -2 -2 -3 -2 -3 -1 -8
    15  H -1  0  0 -1 -1 -1  1  0  0  1  6  1  1 -1 -2 -2 -2  0  2 -1 -1 -8
    16  R -2  0  0 -1 -1 -1  0  0  0  2  1  5  3 -2 -2 -2 -2 -3 -2 -2 -1 -8
    17  K -3  0  0 -1  0 -1  1  0  1  2  1  3  3 -1 -2 -2 -2 -3 -2 -4 -1 -8
    18  M -1 -1 -1 -2 -1 -4 -2 -3 -2 -1 -1 -2 -1  4  2  3  2  2  0 -1 -1 -8
    19  I -1 -2 -1 -3 -1 -4 -3 -4 -3 -2 -2 -2 -2  2  4  3  3  1 -1 -2 -1 -8
    20  L -2 -2 -1 -2 -1 -4 -3 -4 -3 -2 -2 -2 -2  3  3  4  2  2  0 -1 -1 -8
    21  V  0 -1  0 -2  0 -3 -2 -3 -2 -2 -2 -2 -2  2  3  2  3  0 -1 -3 -1 -8
    22  F -1 -3 -2 -4 -2 -5 -3 -4 -4 -3  0 -3 -3  2  1  2  0  7  5  4 -2 -8
    23  Y  0 -2 -2 -3 -2 -4 -1 -3 -3 -2  2 -2 -2  0 -1  0 -1  5  8  4 -2 -8
    24  W -1 -3 -4 -5 -4 -4 -4 -5 -4 -3 -1 -2 -4 -1 -2 -1 -3  4  4 14 -4 -8
    25  X -3  0  0 -1  0 -1  0 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -2 -2 -4 -1 -8
    26  * -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8  1