| 2BUS: reference: Solution conformation of proteinase inhibitor IIA from bull seminal plasma by 1H nuclear magnetic resonance and distance geometry., Williamson MP, Havel TF, Wuthrich K, J Mol Biol 1985 Mar 20;182(2):295-315. PMID: 3839023 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).