Partial alignment of K. lactis zymocin with subgroups C-I and C-II members in E. nidulans. Identical residues in a column are indicated in white and boxed in black, two different residues in a column are indicated by gray boxes, gaps are indicated by dashes. The conserved GH18 gene family active site residues are indicated by asterisks. AN10838 and AN0509 represents the C-II GH18 subgroup, AN5077, AN0517 and AN8481 represents the C-I subgroup, KT = Killer Toxin α-subunit.