The immunological homology between two filamentous cross-linker phosphoproteins, connectin and cross-bridge region of neurofilament-H, is not affected by the phosphorylation state.
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It has recently been shown that a monoclonal antibody SM 1-36-2 against connectin, an elastic filament of striated muscles, binds to the "elastic" domain of the molecule, and that the H subunit of neurofilament (NF-H), an intermediate filament of nerve cells, shares a homologous domain (Shimizu, T. et al. (1988) Biomed. Res. 9, 227-234 and Itoh, Y. et al. (1988) J. Biochem. 104, 504-508). In order to characterize (1) the intramolecular localization of the domain in the NF-H and (2) the effect of the phosphorylation state on the immunoreactivity, the homologous domain in the NF-H was analyzed by Western blotting after limited digestion with trypsin or α-chymotrypsin and dephosphorylation with E. coli alkaline phosphatase. It was found that (1) the epitope was located not in the core region but in the carboxyl-terminal peripheral (cross-bridge) region of NF-H and (2) the epitopes in connectin and NF-H were not affected by the phosphorylation state.
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社団法人 日本生化学会 | 論文
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