2E0X:
reference: Crystal structure of the gamma-glutamyltranspeptidase precursor protein from Escherichia coli. Structural changes upon autocatalytic processing and implications for the maturation mechanism., Okada T, Suzuki H, Wada K, Kumagai H, Fukuyama K, J Biol Chem. 2007 Jan 26;282(4):2433-9. Epub 2006 Nov 29. PMID: 17135273

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