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. 1971 Oct;124(5):921-7.
doi: 10.1042/bj1240921.

Enzymic iodination. A probe for accessible surface proteins of normal and neoplastic lymphocytes

J J Marchalonis, R E Cone, V Santer

Enzymic iodination. A probe for accessible surface proteins of normal and neoplastic lymphocytes

J J Marchalonis et al. Biochem J. 1971 Oct.

Abstract

1. Radioactive iodide was covalently bound to living cells from normal mouse spleen and a variety of lymphoid tumours by a system consisting of lactoperoxidase, hydrogen peroxide and iodide. 2. About 3x10(5)-6x10(5) molecules of [(125)I]iodide/cell could be incorporated without affecting cell viability. 3. Electron-micrographic radioautography showed that the radioactive label was associated with the outer surfaces of the cells. 4. Radioiodinated proteins were solubilized in 9m-urea-0.2m-mercaptoethanol and analysed by gel-filtration and disc electrophoresis. 5. Comparison of distinct tumour lines by disc electrophoresis showed qualitative and quantitative differences in protein distribution patterns.

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