1BTC:
reference: The 2.0-A resolution structure of soybean beta-amylase complexed with alpha-cyclodextrin., Mikami B, Hehre EJ, Sato M, Katsube Y, Hirose M, Morita Y, Sacchettini JC, Biochemistry. 1993 Jul 13;32(27):6836-45. PMID: 8334116

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