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Table 2.

Estimated Number of Substitutions per Site in the Evolution of the Human and Mouse Genomes From Their Common Ancestor

A. Substitutions per Site in 4D Sites
		Base arising
			A	C	G	T
Base replaced	A		0.0232	0.0623	0.0218
	C	0.0232		0.0197	0.0613
	G	0.0623	0.0197		0.0238
	T	0.0218	0.0613	0.0238

B. Substitutions per Site in AR Sites
		Base arising
			A	C	G	T
Base replaced	A		0.0223	0.0748	0.0213
	C	0.0223		0.0136	0.0748
	G	0.0748	0.0136		0.0224
	T	0.0213	0.0748	0.0224

[i] For each type of substitution, the expected number of substitutions of that type per site is estimated from the REV model using data in Table 1. Estimates are for the combined number of substitutions of the given type in both the primate and rodent lineages since they diverged from their common ancestor.