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  • Title: Characterization of a new virus from Mus cervicolor immunologically related to the mouse mammary tumor virus.
    Author: Schlom J, Hand PH, Teramoto YA, Callahan R, Todaro G, Schidlovsky G.
    Journal: J Natl Cancer Inst; 1978 Dec; 61(6):1509-19. PubMed ID: 82634.
    Abstract:
    A virus, similar to the murine mammary tumor viruses (MuMTV) of the laboratory mouse Mus musculus, was identified in the milk of M. cervicolor popaeus mice. The virus was morphologically indistinguishable from the type-B MuMTV and was thus termed MC-MTV. Radioimmunoassays for the 52,000-dalton major envelope glycoprotein and the 28,000-dalton major internal protein of MuMTV demonstrated that MC-MTV shared some antigenic determinants with both of these MuMTV proteins. This reactivity was clearly different, however, from that observed with all MuMTV tested from M. musculus. MC-MTV had a density of 1.16 g/ml in sucrose and a virion-associated DNA polymerase with a divalent cation preference for Mg2+ over Mn2+. Radioimmunoassays clearly differentiated MC-MTV from the other viruses previously identified from M. cervicolor, i.e., M432, CERV-CI, and CERV-CII. These studies thus identified the first virus from another species that is immunologically related to the MuMTV of M. musculus. Particles similar to MC-MTV were also observed in a spontaneous M. cervicolor popaeus mammary tumor.
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