1BLZ:
reference: Structure of isopenicillin N synthase complexed with substrate and the mechanism of penicillin formation., Roach PL, Clifton IJ, Hensgens CM, Shibata N, Schofield CJ, Hajdu J, Baldwin JE, Nature 1997 Jun 19;387(6635):827-30. PMID: 9194566

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