4U2E:
reference: Directed Evolution of New and Improved Enzyme Functions Using an Evolutionary Intermediate and Multidirectional Search., Porter JL, Boon PL, Murray TP, Huber T, Collyer CA, Ollis DL, ACS Chem Biol. 2014 Dec 5. PMID: 25419863

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