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. 1979 Aug;31(2):334–340. doi: 10.1128/jvi.31.2.334-340.1979

Radioimmunoassays for the 36,000-dalton glycoprotein of murine mammary tumor viruses demonstrate type, group, and interspecies determinants.

Y A Teramoto, J Schlom
PMCID: PMC353455  PMID: 90170

Abstract

Mouse mammary tumor viruses (MMTVs) contain distinct membrane glycoproteins of 52,000 daltons (gp52) and 36,000 daltons (gp36). We report here the development of new radioimmunoassays for gp36, using gp36 purified by hydrophobic chromatography and gel filtration. These assays demonstrate that gp36 has both type-specific and group-specific antigenic determinants. The virus-coded nature of these determinants was shown by utilizing different MMTVs grown in the same feline cell line. Interspecies determinants on gp36 were demonstrated by the observations that (i) MC-MTV (a virus isolate from the Asian rodent Mus cervicolor, and morphologically identical to MMTVs) competed, with an altered slope, in the gp36 radioimmunoassay, and (ii) antisera raised against MC-MTV immunopreciptitated 125I-labeled gp36. The detection of gp36 in spontaneous mammary tumors of several strains of mice also facilitates further studies on the replication of MMTVs and the host's immune response to MMTV-mediated oncogenesis.

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Selected References

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