期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1981
卷号：78
期号：12
页码：7570-7574
DOI：10.1073/pnas.78.12.7570
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：We have demonstrated the existence of a spectrin-like protein in a variety of nonerythroid cultured cells. Indirect immunofluorescence studies with monospecific antispectrin IgG indicated the presence of proteins that have common antigenic determinants to spectrin in embryonic chicken cardiac myocytes, mouse fibroblast lines (3T3, simian virus 4-transformed 3T3), and rat hepatoma lines (HTC, HMOA). Two spectrin-like peptides of 240,000 and 230,000 daltons were immunoprecipitated from octyl glucoside-solubilized embryonic chicken cardiac myocytes, along with associated cytoskeletal proteins. Immunoautoradiographic characterization of the myocyte immunoprecipitate showed that only the spectrin-like 240,000- and 230,000-dalton peptides were stained with monospecific antispectrin IgG and 125I-labeled protein A. One-dimensional partial proteolytic mapping of the myocyte 240,000- and 230,000-dalton peptides showed that these peptides share substantial sequence homology with embryonic chicken erythrocyte spectrin 240,000- and 220,000-dalton peptides.
