2BBI:
reference: Three-dimensional structure of soybean trypsin/chymotrypsin Bowman-Birk inhibitor in solution., Werner MH, Wemmer DE, Biochemistry. 1992 Feb 4;31(4):999-1010. PMID: 1734975

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