Fig. 4From: The UT family of MHC class I loci unique to non-eutherian mammals has limited polymorphism and tissue specific patterns of expression in the opossumSites of positive selection in the α1 and α2 domains of ModoUT5. Gray shading represents sites of polymorphism that are not significant, * represent sites of positive selection, yellow shading represents probability of positive selection at specific site at P > 95 % (* significant), while red shading is significant for probability of selection at P > 99 % (** highly significant). Of 52 sites of non-synonymous substitutions across both the α1 and α2 domains, only one was highly probable to be significant, and seven were significantBack to article page