4LEN:
reference: Targeting Class A and C Serine beta-Lactamases with a Broad-Spectrum Boronic Acid Derivative., Tondi D, Venturelli A, Bonnet R, Pozzi C, Shoichet BK, Costi MP, J Med Chem. 2014 Jun 16. PMID: 24882105

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