Figure 4From: Evolution of a cluster of innate immune genes (β-defensins) along the ancestral lines of chicken and zebra finchAlignment of the amino acid sequences of chicken and zebra finch β-defensins. Arrows indicate end of the signal peptide and the start of the mature peptide. Conserved sites are highlighted in black. Sites indicated by "*" have been found to be under positive selection in the chicken genome [15] and sites with "†" show evidence of positive selection in cluster B in the zebra finch genome (see also figure 2).Back to article page