Type B and type C RNA tumor virus replication in single cells. Electron microscopy with tannic acid. 1978

G Schidlovsky, and G P Shibley, and C V Benton, and J E Elser

Simultaneous replication of murine mammary tumor virus (type B) and murine leukemia virus (type C) was demonstrated electron microscopically along continuous stretches of the plasma membrane of single cells in cultures ofthe Mm5mt/c1 cell line. Types B and C virus buds were discriminated in thin sections with the aid of a tannic acid fixative that revealed the type B surface spikes as a homogeneous band of intermediate density and constant width on the surfaces of some buds (type B), whereas others (type C) remained with relatively smooth envelopes. Both types B and C buds may contain morphologically identical horseshoe-shaped nucleoids. Therefore, their identify (type B or C) could be ascertained in thin sections only on the basis of recognition of surface spikes.

UI MeSH Term Description Entries
D007181 Inclusion Bodies, Viral An area showing altered staining behavior in the nucleus or cytoplasm of a virus-infected cell. Some inclusion bodies represent "virus factories" in which viral nucleic acid or protein is being synthesized; others are merely artifacts of fixation and staining. One example, Negri bodies, are found in the cytoplasm or processes of nerve cells in animals that have died from rabies. Negri Bodies,Viral Inclusion Bodies,Negri Body,Bodies, Negri,Bodies, Viral Inclusion,Body, Negri,Body, Viral Inclusion,Inclusion Body, Viral,Viral Inclusion Body
D008324 Mammary Tumor Virus, Mouse The type species of BETARETROVIRUS commonly latent in mice. It causes mammary adenocarcinoma in a genetically susceptible strain of mice when the appropriate hormonal influences operate. Bittner Virus,Mammary Cancer Virus,Mouse mammary tumor virus,Mammary Tumor Viruses, Mouse
D008854 Microscopy, Electron Microscopy using an electron beam, instead of light, to visualize the sample, thereby allowing much greater magnification. The interactions of ELECTRONS with specimens are used to provide information about the fine structure of that specimen. In TRANSMISSION ELECTRON MICROSCOPY the reactions of the electrons that are transmitted through the specimen are imaged. In SCANNING ELECTRON MICROSCOPY an electron beam falls at a non-normal angle on the specimen and the image is derived from the reactions occurring above the plane of the specimen. Electron Microscopy
D009052 Leukemia Virus, Murine Species of GAMMARETROVIRUS, containing many well-defined strains, producing leukemia in mice. Disease is commonly induced by injecting filtrates of propagable tumors into newborn mice. Graffi Virus,Graffi's Chloroleukemic Strain,Leukemia Viruses, Murine,Mouse Leukemia Viruses,Murine Leukemia Virus,Murine Leukemia Viruses,Graffi Chloroleukemic Strain,Graffis Chloroleukemic Strain,Leukemia Viruses, Mouse
D014779 Virus Replication The process of intracellular viral multiplication, consisting of the synthesis of PROTEINS; NUCLEIC ACIDS; and sometimes LIPIDS, and their assembly into a new infectious particle. Viral Replication,Replication, Viral,Replication, Virus,Replications, Viral,Replications, Virus,Viral Replications,Virus Replications
D047348 Hydrolyzable Tannins Polymeric derivatives of GALLIC ACID that are esters of a sugar. Ellagi-Tannins,Ellagitannins,Gallo-Tannins,Gallotannins,Pyrogallol Tannins,Ellagi Tannins,Gallo Tannins,Tannins, Hydrolyzable,Tannins, Pyrogallol

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