Aminoacid variation plot for (a) Group 1 and (b) Group 2 alleles. Chicken antigen binding sites (ABS) are indicated with the letter ‘g’, whereas positively selected sites (PSS) are indicated with black triangles. In the Group 1 plot there are no aminoacids between the positions 24–26, because these alleles were 212-basepair long; hence had a nine-basepair deletion at this location.
Sepil et al. BMC Evolutionary Biology 2012 12:68 doi:10.1186/1471-2148-12-68