| 1HBY: reference: Binding of phosphate and pyrophosphate ions at the active site of human angiogenin as revealed by X-ray crystallography., Leonidas DD, Chavali GB, Jardine AM, Li S, Shapiro R, Acharya KR, Protein Sci 2001 Aug;10(8):1669-76. PMID: 11468363 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).