6C5X:
reference: The molecular basis of JAK/STAT inhibition by SOCS1., Liau NPD, Laktyushin A, Lucet IS, Murphy JM, Yao S, Whitlock E, Callaghan K, Nicola NA, Kershaw NJ, Babon JJ, Nat Commun. 2018 Apr 19;9(1):1558. doi: 10.1038/s41467-018-04013-1. PMID: 29674694

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