Figure 3:Multiple sequence alignment of amino acid sequences of the yak APEX1s with seven mammalian species. (Mus musculue, Homo sapiens, Pan troglodytes, Bos taurus, Sus scrofa, Canis lupus familiaris and Camelus dromedaries). #conserved cysteine; *catalytic and enzymatically important residues; residues involved in DNA backbone interactions.