| 4N64: reference: Preferential recognition of avian-like receptors in human influenza A H7N9 viruses., Xu R, de Vries RP, Zhu X, Nycholat CM, McBride R, Yu W, Paulson JC, Wilson IA, Science. 2013 Dec 6;342(6163):1230-5. doi: 10.1126/science.1243761. PMID: 24311689 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).