4NIR:
reference: Identification and Characterization of an Allosteric Inhibitory Site on Dihydropteroate Synthase., Hammoudeh DI, Date M, Yun MK, Zhang W, Boyd VA, Viacava Follis A, Griffith E, Lee RE, Bashford D, White SW, ACS Chem Biol. 2014 Mar 27. PMID: 24650357

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