5E4H:
reference: Structure of the Dictyostelium Myosin-II Heavy Chain Kinase A (MHCK-A) alpha-kinase domain apoenzyme reveals a novel autoinhibited conformation., Ye Q, Yang Y, van Staalduinen L, Crawley SW, Liu L, Brennan S, Cote GP, Jia Z, Sci Rep. 2016 May 23;6:26634. doi: 10.1038/srep26634. PMID: 27211275

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