1FM2:
reference: The 2.0 A crystal structure of cephalosporin acylase., Kim Y, Yoon K, Khang Y, Turley S, Hol WG, Structure Fold Des 2000 Oct 15;8(10):1059-68. PMID: 11080627

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