5VLE:
reference: Mechanisms of Proton Relay and Product Release by Class A beta-Lactamase at Ultrahigh Resolution., Lewandowski EM, Lethbridge KG, Sanishvili R, Skiba J, Kowalski K, Chen Y, FEBS J. 2017 Nov 2. doi: 10.1111/febs.14315. PMID: 29095570

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