4PLY:
reference: An atomic-resolution view of neofunctionalization in the evolution of apicomplexan lactate dehydrogenases., Boucher JI, Jacobowitz JR, Beckett BC, Classen S, Theobald DL, Elife. 2014 Jun 25:e02304. doi: 10.7554/eLife.02304. PMID: 24966208

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