1KGF:
reference: Elimination of the hydrolytic water molecule in a class A beta-lactamase mutant: crystal structure and kinetics., Zawadzke LE, Chen CC, Banerjee S, Li Z, Wasch S, Kapadia G, Moult J, Herzberg O, Biochemistry 1996 Dec 24;35(51):16475-82. PMID: 8987980

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