| 2VQZ: reference: The structural basis for cap binding by influenza virus polymerase subunit PB2., Guilligay D, Tarendeau F, Resa-Infante P, Coloma R, Crepin T, Sehr P, Lewis J, Ruigrok RW, Ortin J, Hart DJ, Cusack S, Nat Struct Mol Biol. 2008 May;15(5):500-6. Epub 2008 May 4. PMID: 18454157 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).