2DQX:
reference: Kinetic and structural analysis of enzyme sliding on a substrate: multiple attack in beta-amylase., Ishikawa K, Nakatani H, Katsuya Y, Fukazawa C, Biochemistry. 2007 Jan 23;46(3):792-8. PMID: 17223700

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