1BVT:
reference: 1.85 A resolution structure of the zinc (II) beta-lactamase from Bacillus cereus., Carfi A, Duee E, Galleni M, Frere JM, Dideberg O, Acta Crystallogr D Biol Crystallogr 1998 May 1;54 ( Pt 3):313-23. PMID: 9761898

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