title: Identification of Rauscher murine leukemia virus-specific mRNAs for the synthesis of gag- and env-gene products.
abstract: Polyadenylylated mRNA isolated from cells infected with Rauscher murine leukemia virus was fractionated by centrifugation in in a denaturing sucrose gradient into different sizes. Each RNA fraction was injected into oocytes of Xenopus laevis and the virus-specific products were analyzed by immunoprecipitation with polyvalent and monospecific antisera against polypeptides of Rauscher murine leukemia virus, and then by gel electrophoresis and scintillation autoradiography. It was shown that a 35S mRNA species directs the synthesis of a precursor of the internal or group-specific antigens of the virion (the gag-gene products). A 22S mRNA species directs the synthesis of two viral envelope polypeptides and their precursor polypeptide (env-gene products). The results indicate that the gag- and env-related polypeptides of Rauscher murine leukemia virus are synthesized uncoordinately and provide evidence for open and closed cistrons on the virus-specific mRNAs.
mesh_terms: D000937:Antigen-Antibody Reactions; D002474:Cell-Free System; D005796:Genes; D005814:Genes, Viral; D008970:Molecular Weight; D011061:Poly A / Q000378:metabolism; D011498:Protein Precursors / Q000096:biosynthesis*; D012333:RNA, Messenger / Q000302:isolation & purification / Q000378:metabolism*; D012367:RNA, Viral / Q000302:isolation & purification / Q000378:metabolism*; D011925:Rauscher Virus / Q000378:metabolism*; D014764:Viral Proteins / Q000096:biosynthesis* / Q000276:immunology
chemical_list: D011498:Protein Precursors; D012333:RNA, Messenger; D012367:RNA, Viral; D014764:Viral Proteins; D011061:Poly A
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