2DH6:
reference: Large conformational changes in the Escherichia coli tryptophan synthase beta(2) subunit upon pyridoxal 5'-phosphate binding., Nishio K, Ogasahara K, Morimoto Y, Tsukihara T, Lee SJ, Yutani K, FEBS J. 2010 May;277(9):2157-70. Epub 2010 Mar 27. PMID: 20370823

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