4YZW:
reference: The structure of a prophenoloxidase (PPO) from Anopheles gambiae provides new insights into the mechanism of PPO activation., Hu Y, Wang Y, Deng J, Jiang H, BMC Biol. 2016 Jan 5;14(1):2. doi: 10.1186/s12915-015-0225-2. PMID: 26732497

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