4WH3:
reference: Open-close structural change upon ligand binding and two magnesium ions required for the catalysis of N-acetylhexosamine 1-kinase., Sato M, Arakawa T, Nam YW, Nishimoto M, Kitaoka M, Fushinobu S, Biochim Biophys Acta. 2015 Jan 30;1854(5):333-340. doi:, 10.1016/j.bbapap.2015.01.011. PMID: 25644306

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