Physicochemical 
                
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                (S)
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                Electrophoresis on polyacrylamide gel showed four proteins in 
              virion and at least three other virus-coded proteins in infected 
              cells (15).
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                (S)
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                (S)
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            | Stability of Infectivity (effects) | 
        
        
            
                 
                
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            | Virion Morphology | 
        
        
            
                 
                
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                nm
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                nm
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            | Morphogenesis | 
        
        
            
                 
                
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            | Hemagglutination | 
        
        
            
                 
                Yes
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                SMB ext. by sucrose-acetone or acetone-ether
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                Goose
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                6.4-7.3
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                6.6
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                37dC used routinely
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                CF, NT
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