4KM4:
reference: Ground state destabilization by anionic nucleophiles contributes to the activity of phosphoryl transfer enzymes., Andrews LD, Fenn TD, Herschlag D, PLoS Biol. 2013 Jul;11(7):e1001599. doi: 10.1371/journal.pbio.1001599. Epub 2013 , Jul 2. PMID: 23843744

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