Conservation of promoter, coding and intronic regions of the non-classical MHC class II DYA gene suggests evolution under functional constraints.


The major histocompatibility complex (MHC) in ruminants contains a unique pair of class II genes (DYA and DYB) of unknown function. As functional genes show higher levels of nucleotide conservation than pseudogenes we compared the DYA genes from sheep and cattle, two species which diverged from a common ancestor approximately 20 million years ago… (More)


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