2TSY:
reference: Crystal structures of a mutant (betaK87T) tryptophan synthase alpha2beta2 complex with ligands bound to the active sites of the alpha- and beta-subunits reveal ligand-induced conformational changes., Rhee S, Parris KD, Hyde CC, Ahmed SA, Miles EW, Davies DR, Biochemistry 1997 Jun 24;36(25):7664-80. PMID: 9201907

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