6BCB:
reference: Crystal structures of the PH domains from Lbc family of RhoGEFs bound to activated RhoA GTPase., Chen Z, Gutowski S, Sternweis PC, Data Brief. 2018 Feb 20;17:356-362. doi: 10.1016/j.dib.2018.01.024. eCollection, 2018 Apr. PMID: 29876405

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