Figure 2. Alignment of predicted amino acid sequences of six MHC class IIA alleles from three haplotypes.

The duck (Anpl-IIa) and chicken (Gaga-BLA) amino acid sequences are provided for reference. The first amino acid of the α1 domain was designated as position 1. Identity with the Nini-DAA1*01 sequence is indicated with a dot. Gaps are indicated by dashes. Asterisks above the sequence of the α1 domain indicate peptide-binding residues [39].