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The alignment of NAT8 protein sequences: 1- Homo sapiens, 2- Pan troglodytes, 3- Mus musculus, 4- Rattus norvegicus, 5-Xenopus tropicalis. Arrows pointing at polymorphic amino acid positions (14 Arg-His, 73 Ala-Val, 121 Met-Thr, 130 Pro-Pro, 143 Phe-Ser).
