Notes: Numbers correspond to the alignment shown in Figure 2. aAmino acids identified in model M8 by the Bayes empirical Bayes procedure  using Codeml. Only those sites predicted to be undergoing positive selection with a posterior probability >95% are presented in the table. The * indicates that the posterior probability is >95%, and ** shows that the probability is >99%. bAmino acid sites identified by FEL are identified with ^. cAmino acid sites identified by MEME are identified with ^.