C    A    T    G    T    A    A    T    T
A   13  100  0.5  0.6  0.5  100  100   18   14
G   10   49    1  100  0.5    2    9    7    4
C  100    3    3  0.5    1    2    5    5    7
T   53   18  100  0.5  100    3   19  100  100

JBC 1997, 272:8402-8409