4WP9:
reference: Autoinhibitory mechanism and activity-related structural changes in a mycobacterial adenylyl cyclase., Barathy DV, Bharambe NG, Syed W, Zaveri A, Visweswariah SS, Colavarsigmao M, Misquith S, Suguna K, J Struct Biol. 2015 Jun;190(3):304-13. doi: 10.1016/j.jsb.2015.04.013. Epub 2015 , Apr 24. PMID: 25916753

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