3VUT:
reference: Crystal and solution structures disclose a putative transient state of mitogen-activated protein kinase kinase 4., Matsumoto T, Kinoshita T, Kirii Y, Tada T, Yamano A, Biochem Biophys Res Commun. 2012 Aug 24;425(2):195-200. Epub 2012 Jul 22. PMID: 22828509

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