1GA9:
reference: Structure-based design and in-parallel synthesis of inhibitors of AmpC beta-lactamase., Tondi D, Powers RA, Caselli E, Negri MC, Blazquez J, Costi MP, Shoichet BK, Chem Biol 2001 Jun;8(6):593-611. PMID: 11410378

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