1FKM:
reference: Crystal structure of the GAP domain of Gyp1p: first insights into interaction with Ypt/Rab proteins., Rak A, Fedorov R, Alexandrov K, Albert S, Goody RS, Gallwitz D, Scheidig AJ, EMBO J 2000 Oct 2;19(19):5105-13. PMID: 11013213

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