Divalent cation sites in tomato bushy stunt virus. Difference maps at 2-9 A resolution.
Difference electron density maps, using as few as four 1/2 degrees oscillation photographs, have been computed for tomato bushy stunt virus crystals soaked in EDTA. GdCl3 and silicotungstate. The maps define a double divalent cation site, responsible for regulating expansion of the virus particle, as well as sites for binding tungstate anions.
D001665:Binding Sites; D002413:Cations, Divalent; D003461:Crystallography; D004492:Edetic Acid; D005682:Gadolinium; D010781:Photography / Q000379:methods; D010942:Plant Viruses; D011487:Protein Conformation; D017640:Silicates; D012824:Silicic Acid; D014414:Tungsten; D017973:Tungsten Compounds; D014764:Viral Proteins
D002413:Cations, Divalent; D017640:Silicates; D017973:Tungsten Compounds; D014764:Viral Proteins; D012824:Silicic Acid; D004492:Edetic Acid; D005682:Gadolinium; C021746:silicotungstic acid; D014414:Tungsten