. . . . . . . . "Proton donor" . "223"^^ . . "223"^^ . . "An active site occurs in NX_Q01064-1 at amino acids 223 - 223." . . . . . "neXtProt gold" . . . . . . . . . "2014-09-19T00:00:00.0Z"^^ . . . "neXtProt database" . "CALIPHO project" . . . . . "2" . . .