3FNM:
reference: Crystal Structure of Acivicin-Inhibited gamma-Glutamyltranspeptidase Reveals Critical Roles for Its C-Terminus in Autoprocessing and Catalysis (dagger) (double dagger)., Williams K, Cullati S, Sand A, Biterova EI, Barycki JJ, Biochemistry. 2009 Mar 24;48(11):2459-67. PMID: 19256527

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