6FM6:
reference: The Atomic Resolution Structure of a Class C beta-lactamase and of its Complex with Avibactam., Mangani S, Pozzi C, Di Pisa F, De Luca F, Benvenuti M, Docquier JD, ChemMedChem. 2018 May 22. doi: 10.1002/cmdc.201800213. PMID: 29786960

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