Table 2.
Nonconsensus-to-nonconsensus and nonconsensus-to-consensus changes in mouse and rat lineages
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Substitutions at all positions are combined. For acceptor sites, position −4 (consensus base = N) is not considered. χ2 values (1 degree of freedom) are 9.7 (P = 2 × 10−3) for donor and 11.93 (P = 5 × 10−4) for acceptor sites.











