Physicochemical 
                RNA, Single Strand
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              | 
        
        
            
                 
                3
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                29; 23; 17 s (7)(S)
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                3
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                Nucleocapsid (N):  25,000 MW;
              glycoproteins (G1, G2):  75,000, 65,000 MW (4, 33, 34).
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                1.20 gm/cc in CsCl
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                450 s(S)
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                1.31 gm/cc in CsCl (4)
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                (S)
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  | 
        
        
            | Stability of Infectivity (effects) | 
        
        
            
                 
                Rel. stable at pH 4.6-11.4 (mouse brain suspension)(8)
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                1:5
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                1.7 dex
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                5.6 dex
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                1:1000
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                1.0 dex
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                5.5 dex
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                Not stabilized by MgCl2; sens. to chloroform, nonionic and ionic
              detergents (4,8,9)
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  | 
        
        
            | Virion Morphology | 
        
        
            
                 
                
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                95 nm
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                nm
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                nm
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                Electron microscopy (2-5)
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                10 nm spikes, hexagonal array (2); lipid envelope (4,6)
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            | Morphogenesis | 
        
        
            
                 
                
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                Buds through smooth surface cytoplasmic membranes (3)
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                Cisternae and vesicles of Golgi complex and endoplasmic reticulum
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  | 
        
        
            | Hemagglutination | 
        
        
            
                 
                Yes
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                SMB ext. by sucrose-acetone; BHK-21 culture fluid-serum free
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                Goose
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                5.6-6.6
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                5.6-5.8
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                4dC, RT, 3dC
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                HA not readily produced from all strains
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                CF, HI, NT
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                HA not readily produced from all strains
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