1BXF:
reference: Three-dimensional structures of the cysteine proteases cathepsins K and S deduced by knowledge-based modelling and active site characteristics., Fengler A, Brandt W, Protein Eng 1998 Nov;11(11):1007-13. PMID: 9876921

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