1TAL:
reference: Conformational substates in enzyme mechanism: the 120 K structure of alpha-lytic protease at 1.5 A resolution., Rader SD, Agard DA, Protein Sci 1997 Jul;6(7):1375-86. PMID: 9232638

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