function [matrix, matrixInfo] = pam130
%PAM130 substitution matrix in 1/2 bit units,
%   Expected score = -1.48, Entropy = 0.895 bits
%   Lowest score = -8, Highest score = 12
%
%   Order:
%   A  R  N  D  C  Q  E  G  H  I  L  K  M  F  P  S  T  W  Y  V  B  Z  X  *
%
%   [MATRIX,MATRIXINFO] = PAM130 returns a structure of information about
%   the matrix with fields Name, Scale, Entropy, ExpectedScore, LowestScore,
%   HighestScore and Order.

% Source:  ftp://ftp.ncbi.nih.gov/blast/matrices/
%   $Revision: 1.5 $ 

matrix = [...
   3 -3  0  0 -3 -1  0  1 -2 -1 -3 -2 -2 -4  1  1  1 -6 -4  0  0  0 -1 -8;...
  -3  6 -1 -3 -4  1 -3 -4  1 -2 -4  2 -1 -5 -1 -1 -2  1 -5 -3 -2 -1 -2 -8;...
   0 -1  4  2 -4  0  1  0  2 -2 -3  1 -3 -4 -1  1  0 -4 -2 -3  3  0 -1 -8;...
   0 -3  2  5 -6  1  3  0  0 -3 -5 -1 -4 -7 -2  0 -1 -7 -5 -3  4  3 -1 -8;...
  -3 -4 -4 -6  9 -6 -6 -4 -4 -3 -7 -6 -6 -5 -3  0 -3 -8 -1 -2 -5 -6 -4 -8;...
  -1  1  0  1 -6  5  2 -2  3 -3 -2  0 -1 -6  0 -1 -2 -6 -5 -3  0  4 -1 -8;...
   0 -3  1  3 -6  2  5 -1  0 -2 -4 -1 -3 -6 -2 -1 -1 -8 -5 -3  2  4 -1 -8;...
   1 -4  0  0 -4 -2 -1  5 -3 -4 -5 -3 -4 -5 -2  1 -1 -7 -6 -2  0 -1 -2 -8;...
  -2  1  2  0 -4  3  0 -3  7 -3 -3 -1 -3 -2 -1 -2 -2 -3  0 -3  1  1 -1 -8;...
  -1 -2 -2 -3 -3 -3 -2 -4 -3  5  1 -2  2  0 -3 -2  0 -6 -2  3 -3 -3 -1 -8;...
  -3 -4 -3 -5 -7 -2 -4 -5 -3  1  5 -4  3  1 -3 -4 -2 -2 -2  1 -4 -3 -2 -8;...
  -2  2  1 -1 -6  0 -1 -3 -1 -2 -4  5  0 -6 -2 -1  0 -5 -5 -4  0  0 -1 -8;...
  -2 -1 -3 -4 -6 -1 -3 -4 -3  2  3  0  8 -1 -3 -2 -1 -5 -4  1 -3 -2 -1 -8;...
  -4 -5 -4 -7 -5 -6 -6 -5 -2  0  1 -6 -1  7 -5 -3 -4 -1  4 -2 -5 -6 -3 -8;...
   1 -1 -1 -2 -3  0 -2 -2 -1 -3 -3 -2 -3 -5  6  1 -1 -6 -6 -2 -2 -1 -1 -8;...
   1 -1  1  0  0 -1 -1  1 -2 -2 -4 -1 -2 -3  1  3  2 -2 -3 -2  0 -1 -1 -8;...
   1 -2  0 -1 -3 -2 -1 -1 -2  0 -2  0 -1 -4 -1  2  4 -6 -3  0  0 -2 -1 -8;...
  -6  1 -4 -7 -8 -6 -8 -7 -3 -6 -2 -5 -5 -1 -6 -2 -6 12 -1 -7 -5 -7 -5 -8;...
  -4 -5 -2 -5 -1 -5 -5 -6  0 -2 -2 -5 -4  4 -6 -3 -3 -1  8 -3 -3 -5 -3 -8;...
   0 -3 -3 -3 -2 -3 -3 -2 -3  3  1 -4  1 -2 -2 -2  0 -7 -3  5 -3 -3 -1 -8;...
   0 -2  3  4 -5  0  2  0  1 -3 -4  0 -3 -5 -2  0  0 -5 -3 -3  3  2 -1 -8;...
   0 -1  0  3 -6  4  4 -1  1 -3 -3  0 -2 -6 -1 -1 -2 -7 -5 -3  2  4 -1 -8;...
  -1 -2 -1 -1 -4 -1 -1 -2 -1 -1 -2 -1 -1 -3 -1 -1 -1 -5 -3 -1 -1 -1 -1 -8;...
  -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8  1;...
    ];

if nargout >1
    matrixInfo.Name = 'PAM130';
    matrixInfo.Scale = 1/2;
    matrixInfo.Entropy = 0.895 ;
    matrixInfo.ExpectedScore = -1.48;
    matrixInfo.LowestScore = -8;
    matrixInfo.HighestScore = 12;
    matrixInfo.Order = 'ARNDCQEGHILKMFPSTWYVBZX*';
end