| pubmed-article:3008440 | pubmed:abstractText | The structure of human parainfluenza type 3 virus was studied by electron microscopy and virion fractionation by treatment with a detergent and high ionic strength. The protein spectrum of the virus was studied. The presence of 6 structural proteins was revealed of which two, HN and F, are glycoproteins. Intracellular cleavage of F0 protein into F1+2 proteins was demonstrated in a pulse-chase experiment. A tighter binding of HN protein than of F protein with the virus lipoprotein membrane was observed which may be useful for obtaining purified F protein preparations. | lld:pubmed |
