Summary of genetic variation for MHC class II DRβ1 sequences in the Magellanic and Galápagos penguins.

Number of samples (N), number of alleles (A), number of polymorphic sites (S), average number of nucleotide differences (k), nucleotide diversity (π), haplotype diversity (h), and observed (Ho) and expected (He) heterozygosity are presented. P-values (P) are reported for tests of deviations from Hardy-Weinberg equilibrium. SD represents standard deviations.