1K7X:
reference: Crystal structure of the beta Ser178--> Pro mutant of tryptophan synthase. A "knock-out" allosteric enzyme., Weyand M, Schlichting I, Herde P, Marabotti A, Mozzarelli A, J Biol Chem 2002 Mar 22;277(12):10653-60. PMID: 11756454

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