2DF4:
reference: Ammonia channel couples glutaminase with transamidase reactions in GatCAB., Nakamura A, Yao M, Chimnaronk S, Sakai N, Tanaka I, Science. 2006 Jun 30;312(5782):1954-8. PMID: 16809541

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