| 1CQ4: reference: Crystal structure of a dimeric chymotrypsin inhibitor 2 mutant containing an inserted glutamine repeat., Chen YW, Stott K, Perutz MF, Proc Natl Acad Sci U S A 1999 Feb 16;96(4):1257-61. PMID: 9990011 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).