3A3D:
reference: Crystal Structures of Penicillin-Binding Proteins 4 and 5 from Haemophilus influenzae., Kawai F, Clarke TB, Roper DI, Han GJ, Hwang KY, Unzai S, Obayashi E, Park SY, Tame JR, J Mol Biol. 2009 Dec 1. PMID: 19958776

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