1B1Y:
reference: The crystal structure of the sevenfold mutant of barley beta-amylase with increased thermostability at 2.5 A resolution., Mikami B, Yoon HJ, Yoshigi N, J Mol Biol 1999 Jan 22;285(3):1235-43. PMID: 9918723

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