6JBD:
reference: Crystal structure of pantoate kinase from Thermococcus kodakarensis., Kita A, Kishimoto A, Shimosaka T, Tomita H, Yokooji Y, Imanaka T, Atomi H, Miki K, Proteins. 2020 May;88(5):718-724. doi: 10.1002/prot.25852. Epub 2019 Nov 20. PMID: 31697438

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