CHARACTERIZATION OF BOVINE PARA-INFLUENZA VIRUS TYPE-3

Bovine parainfluenza virus type 3 (PIV-3) has a buoyant density of 1.197. The RNA of PIV-3, like that of Sendai virus, is a single continuous chain which lacks polyadenylic acid sequences and tends to self-anneal to a marked extent. It has a sedimentation coefficient of 42S and a molecular weight of 4.5 X 106 being slightly smaller than Sendai virus RNA (47S, 5.3 x 106). PIV-3 has 5 main structural proteins, of which 2 are glycoproteins. The molecular weights of protein1 protein2 protein3 glycoprotein1 and glycoprotein2 were estimated to be 79,000, 68,000, 35,000, 69,000, and 55,000, respectively. Protein2 was suggested to be nucleocapsid protein. © 1979, Center For Academic Publications Japan. All rights reserved.