1HB1:
reference: Alternative oxidation by isopenicillin N synthase observed by X-ray diffraction., Ogle JM, Clifton IJ, Rutledge PJ, Elkins JM, Burzlaff NI, Adlington RM, Roach PL, Baldwin JE, Chem Biol 2001 Dec;8(12):1231-7. PMID: 11755401

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