Genetic variation at the DRB exon 2 of some endangered or near threatened species.

The information on all studies derived from DRB sequence analysis includes sample size, number of alleles, length in base pairs (bp) of the DNA fragment analysed in parentheses, observed heterozygosity, average percentage nucleotide (%N) and amino acid (%A) divergence between alleles. In parentheses are the minimum and maximum number of nucleotide (or amino acid, respectively) differences observed between pairs of alleles.