Evidence of positive Darwinian selection from site-specific model analyse for the MHC class II genes of fish

Note: P number of parameters in the ω distribution, K estimated transition/transversion rate ration, ω selection parameter, and pn proportion of sites that fall into the ωn site class. p, q shape parameters of the β function (for models M7 and M8). Positively selected sites with posterior probability >0.95 are in bold, 0.9–0.95 are underlined, 0.8–0.9 are italics, and 0.5–0.8 in plain text.