passages.id: split_5_test_260_passage
passages.type: progene_text
passages.text: The enzyme - bound metal is coordinated by three conserved Glu residues ( Glu - 56 , Glu - 57 , and Glu-98 ) , the backbone carbonyl of a conserved Gly residue ( Gly-38 ) , and by two water ligands .