Table 1.

Probability distribution of bases and the corresponding self-information values.

a	PA, PT = 0.25 – a	PC, PG = 0.25 + a	I(X) (bit/base)	I(X)/Imax(X)*
0	0.25	0.25	2	100%
0.001	0.249	0.251	1.999988	99.999%
0.005	0.245	0.255	1.999711	99.986%
0.01	0.24	0.26	1.998846	99.942%
0.05	0.2	0.3	1.970951	98.548%
0.1	0.15	0.35	1.881291	94.065%
0.15	0.1	0.4	1.721928	86.096%
0.2	0.05	0.45	1.468996	73.450%
0.24	0.01	0.49	1.141441	57.072%

*I_max(X) = 2 bit/base.