5MVA:
reference: Relaxed and active thin filament structures; a new structural basis for the regulatory mechanism., Paul DM, Squire JM, Morris EP, J Struct Biol. 2017 Mar;197(3):365-371. doi: 10.1016/j.jsb.2017.01.004. Epub 2017, Feb 1. PMID: 28161413

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