Figure 4.

Minimum numbers of putative MHC class Ia loci in amphibian species. The simplified phylogenetic tree of amphibian species with a deduced number of MHC class Ia loci is based on the amphibian pedigree shown in [42]. The putative number of loci is shown above the corresponding branches.

Zhao et al. BMC Evolutionary Biology 2013 13:113   doi:10.1186/1471-2148-13-113
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