1GA0:
reference: Inhibition of class C beta-lactamases: structure of a reaction intermediate with a cephem sulfone., Crichlow GV, Nukaga M, Doppalapudi VR, Buynak JD, Knox JR, Biochemistry 2001 May 29;40(21):6233-9. PMID: 11371184

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).