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. 1982 Dec;79(24):7669–7673. doi: 10.1073/pnas.79.24.7669

Purification and biochemical properties of tumor-associated transplantation antigens from methylcholanthrene-induced murine sarcomas.

G C DuBois, L W Law, E Appella
PMCID: PMC347409  PMID: 6961442

Abstract

A tumor-associated transplantation antigen with an apparent molecular weight of 75,000 has been isolated from the cytosol of the BALB/c methylcholanthrene-induced sarcoma, Meth A. The antigen was purified either by preparative electrophoresis in the presence of NaDodSO4 or by immunoaffinity chromatography after hexylamine agarose chromatography, gel filtration, and hydroxylapatite chromatography. The 75-kilodalton (kDal) protein prepared by either of these methods effectively primed BALB/c mice to reject the Meth A tumor; such priming provided no protection against challenge by other independently derived sarcomas of BALB/c origin. A second protein, also 75 kDal, was isolated from the cytosol of the recently derived methylcholanthrene-induced sarcoma CI-4 by essentially the same chromatographic scheme. This protein also was immunogenic in the tumor rejection assay and provided protection only against CI-4 challenge. The antigens purified from the Meth A and CI-4 sarcomas appear to be closely related proteins. Both of them can be purified from the cytosol fraction and can be recognized by a rabbit antiserum prepared against the Meth A 75-kDal protein. The two proteins have approximately the same molecular weight, have similar but not identical amino acid compositions, and differ in their chromatographic behavior on hexylamine agarose and hydroxylapatite as well as in their isoelectric points. These results indicate that the individually specific transplantation antigens found in chemically induced sarcomas may be the products of a single multigene family or somatic derivatives of a single gene.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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