1U30:
reference: In situ extension as an approach for identifying novel alpha -amylase inhibitors., Numao S, Damager I, Li C, Wrodnigg T, Begum A, Overall CM, Brayer GD, Withers SG, J Biol Chem 2004 Aug 10;. PMID: 15304511

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