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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Otto, J. J. Fellini, S. A. Croop, J. M. Bryan, J. Holtzer, H. Bennett, G. S. |
| Abstract | The protein subunit of 100-A filaments constitutes approximately 50% of the cytoskeleton protein of chick fibroblasts. In addition to the 43,000-dalton protein (constitutive actin) common to all cell types, fibroblast cytoskeletons contain a 58,000-dalton protein likely to be the 100-A filament subunit, whereas smooth muscle contains, instead, a 55,000-dalton protein. Additional differences among 100-A filaments are shown by immunofluorescence using antibodies angainst chick fibroblast 58,000-dalton component (anti-F58K) and against chick brain 100-A filament subunits (anti-BF). Anti-F58K binds to 100-A filaments in chick fibroblasts, presumptive myoblasts, chondroblasts, pigment cells, and neurons, but not to 100-A filaments in mouse or human fibroblasts. This antibody stains cables of 100-A filaments induced by sequentially treating cells with cytochalasin B and Colcemid. Anti-BF binds only to neurofilaments and not to 100-A filaments of other cell types studied. Absorption or antibodies with purified subunits from gizzard 100-A filaments eliminates binding of anti-F58K to the filaments of all cell types but does not diminish binding of anti-BF to neurofilaments. Various IgGs also bind nonspecifically to induced cables of 100-A filaments. The problem of nonspecific binding of labeled antibodies, as well as the problem of cell and species specificity of the 100-A filaments, is discussed. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 9 |
| Volume Number | 75 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1978-12-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Cytoplasm Actins Metabolism Brain Ultrastructure Cells, Cultured Cytochalasin B Pharmacology Demecolcine Fluorescent Antibody Technique Molecular Weight Muscle Proteins Nerve Tissue Proteins Research Support, U.S. Gov't, Non-P.H.S. Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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