Fig. 5From: The strength of selection is consistent across both domains of the MHC class I peptide-binding groove in birdsLinear associations between amino acid polymorphism (a Grantham distance; b Sandberg distance) at MHC class I exon 2 and exon 3 across 20 avian families. Linear regressions (solid lines) with 95% confidence intervals (dashed lines) are shownBack to article page