3CG5:
reference: Structure of the covalent adduct formed between Mycobacterium tuberculosis beta-lactamase and clavulanate., Tremblay LW, Hugonnet JE, Blanchard JS, Biochemistry. 2008 May 13;47(19):5312-6. Epub 2008 Apr 19. PMID: 18422342

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