1IEL:
reference: Structures of ceftazidime and its transition-state analogue in complex with AmpC beta-lactamase: implications for resistance mutations and inhibitor design., Powers RA, Caselli E, Focia PJ, Prati F, Shoichet BK, Biochemistry 2001 Aug 7;40(31):9207-14. PMID: 11478888

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