6DVH:
reference: Structure and role for active site lid of lactate monooxygenase from Mycobacterium smegmatis., Kean KM, Karplus PA, Protein Sci. 2018 Sep 11. doi: 10.1002/pro.3506. PMID: 30207005

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