| 1LD5: reference: NMR structures of two variants of bovine pancreatic trypsin inhibitor (BPTI) reveal unexpected influence of mutations on protein structure and stability., Cierpicki T, Otlewski J, J Mol Biol 2002 Aug 23;321(4):647-58. PMID: 12206780 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).