Physicochemical 
                RNA, Single Strand
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                3
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                L=2.7x106 MW; M=1.2x106 MW; S=0.6x106 MW(S)
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                4
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                Nucleocapsid protein=52,000 MW; envelope glycoprotiens:
              G1=64,000 MW, G2=58,000 MW; L protein=approx. 200,000 MW
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                (S)
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                (S)
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            | Stability of Infectivity (effects) | 
        
        
            
                 
                
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                Cobalt irradiation (1.3 x 107 rads) inactivates infectivity
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            | Virion Morphology | 
        
        
            
                 
                
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                nm
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                nm
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            | Morphogenesis | 
        
        
            
                 
                Cytoplasm
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            | Hemagglutination | 
        
        
            
                 
                Yes
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                Purified cell culture propagated virions
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                Gander
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                5.8-6.8
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                5.8-6.2
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                37dC
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                PRNT, IFA, HI, ELISA
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