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. 1983 Nov 1;97(5):1389–1395. doi: 10.1083/jcb.97.5.1389

Association between the mammalian 110,000-dalton heat-shock protein and nucleoli

PMCID: PMC2112693  PMID: 6355118

Abstract

A rabbit antiserum has been prepared using as antigen the 110,000- dalton mammalian heat-shock protein. This protein was purified for injection by two-dimensional PAGE of heat-shocked Chinese hamster ovary cells. Characterization by immunoautoradiography and immunoprecipitation reveals that the antiserum is specific for the 110,000-dalton protein. Both techniques also reveal that the protein against which the antiserum is directed is induced by heat shock. Indirect immunofluorescence shows that the antigen is primarily localized at or near the nucleolus in cultured cells and numerous murine tissues. Treatment of cultured cells with deoxyribonuclease destroys the organization of staining within the nucleus while ribonuclease appears to completely release the antigen from the nucleus. A binding of the antiserum to cytoplasmic structures is also observed by immunofluorescence. This association with nucleoli may have implications in the regulatory aspects of the heat-shock response.

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Selected References

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