| 3BTM: reference: The crystal structures of the complexes between bovine beta-trypsin and ten P1 variants of BPTI., Helland R, Otlewski J, Sundheim O, Dadlez M, Smalas AO, J Mol Biol 1999 Apr 16;287(5):923-42. PMID: 10222201 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).