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- W2067706619 abstract "Monoclonal antibody TEC-02, raised against mouse embryonal carcinoma cells, has been shown to react with murine preimplantation embryos and with a very limited number of adult mouse tissues. The target epitope, TEC-2, is a carbohydrate carried in mouse embryonal carcinoma cells by large glycoprotein-bound glycan. We report here the expression of TEC-2 epitope on human carcinoma-derived cell lines, HeLa and HS, and the properties of its carbohydrate carriers. Immunolabeling of Nonidet P-40 lysates of HeLa cells separated by sodium dodecyl sulfate-polyacrylamide gel electrophoresis revealed that TEC-2 antigens are polydispersed glycoconjugates of high molecular weight (mostly above 100,000). TEC-2 antigens detected by the two-site sandwich assay, in which the antigen is immobilized and detected with the same antibody, had a slightly higher molecular weight than those detected by the solid-phase assay. This suggests heterogeneity in the number of TEC-2 epitopes per carrier molecule. When the cells were lysed by Triton X-114 and the detergent and aqueous phases were separated by warming and centrifugation, most of the TEC-2 antigenic activity was found in the aqueous phase. TEC-2 antigens isolated by indirect precipitation from [3H]galactose-labeled HeLa cells were degraded by extensive pronase digestion or mild alkaline treatment to glycopeptides or oligosaccharides of low molecular weight. Thus, TEC-2 epitope in human HeLa cells is carried by carbohydrates of only several monosaccharide units. TEC-02 antibody was also found to bind to Tamm-Horsfall glycoprotein isolated from human urine and its binding was enhanced by desialylation. Combined data indicate that TEC-02 antibody recognizes the GalNAc beta 1----4Gal beta 1----4 structure which may be carried on different types of molecule, according to the site of their synthesis." @default.
- W2067706619 created "2016-06-24" @default.
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- W2067706619 date "1988-03-01" @default.
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- W2067706619 title "Expression of mouse embryonic epitope TEC-2 on human carcinoma-derived cell lines and characterization of its glycoprotein carriers" @default.
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- W2067706619 doi "https://doi.org/10.1016/0167-4889(88)90020-1" @default.
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