Sequence comparison of NAAGS-II from different vertebrate species. The amino acid sequences of NAAGS-II from mouse (Mm), human (Hs), guinea pig (Cp), cow (Bt), elephant (La), opossum (Md), and X. tropicalis (Xt) were aligned using CLUSTALW. Residues identical in all sequences are shaded black and residues that are similar in all sequences are shaded gray.