4HSR:
reference: Structure of a class III engineered cephalosporin acylase. Comparisons to class I acylase and implications for differences in substrate specificity and catalytic activity., Golden E, Paterson R, Tie WJ, Anandan A, Flematti G, Molla G, Rosini E, Pollegioni L, Vrielink A, Biochem J. 2013 Feb 4. PMID: 23373797

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