1KNI:
reference: Structure of a stabilizing disulfide bridge mutant that closes the active-site cleft of T4 lysozyme., Jacobson RH, Matsumura M, Faber HR, Matthews BW, Protein Sci 1992 Jan;1(1):46-57. PMID: 1304882

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