4FID:
reference: Heterotrimeric G-protein Signaling Is Critical to Pathogenic Processes in Entamoeba histolytica., Bosch DE, Kimple AJ, Muller RE, Giguere PM, Machius M, Willard FS, Temple BR, Siderovski DP, PLoS Pathog. 2012 Nov;8(11):e1003040. doi: 10.1371/journal.ppat.1003040. Epub, 2012 Nov 15. PMID: 23166501

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