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. 2001 Mar 1;29(5):1191–1199. doi: 10.1093/nar/29.5.1191

Table 4. Base substitution frequencies for two sequences within the HIV genome.

Base change
env Subtype A (%)
env Subtype B (%)
TAR (%)
A to C  9.6  8.3  1.9
A to G 23.4 20.4 27.4
A to T  4.8  5.5  4.2
C to A  6.0  5.3  1.9
C to G  2.6  2.0  2.9
C to T 12.0 10.4  9.7
G to A 18.8 21.7 15.2
G to C  4.0  3.5  1.7
G to T  3.4  2.9 10.9
T to A  4.5  5.9  5.4
T to C  9.9  7.0 11.9
T to G  5.0  7.2  6.9