4HIM:
reference: Nonspecific Recognition Is Achieved in Pot1pC through the Use of Multiple Binding Modes., Dickey TH, McKercher MA, Wuttke DS, Structure. 2012 Nov 28. pii: S0969-2126(12)00411-X. doi:, 10.1016/j.str.2012.10.015. PMID: 23201273

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