2M1A:
reference: The Arginine-Rich RNA-Binding Motif of HIV-1 Rev Is Intrinsically Disordered and Folds upon RRE Binding., Casu F, Duggan BM, Hennig M, Biophys J. 2013 Aug 20;105(4):1004-17. doi: 10.1016/j.bpj.2013.07.022. PMID: 23972852

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