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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Holladay, C. R. Spooner, B. S. Morgan, J. L. |
| Abstract | The antigenic similarities and differences between various actins were explored by use of antisera against purified bovine cardiac actin and chicken embryo brain actin. In double-antibody coprecipitation tests, purified iodinated actins from bovine cardiac muscle, rabbit skeletal muscle, chicken embryo brain, and bovine brain all bound to antiserum against chicken embryo brain actin. This result demonstrates the presence of shared antigenic determinants among these actins. Cardiac actin antiserum, on the other hand, bound cardiac and skeletal actin, but failed to bind significantly either brain actin. In radioimmunoassay, all four unlabeled actins were capable of some degree of inhibition of binding of (125)I-labeled chicken embryo brain actin to homologous antiserum. The results confirm the existence of shared or similar antigenic determinants, but also show that the molecules are not antigenically identical. In the cardiac actin radioimmunoassay, unlabeled cardiac and skeletal muscle actins inhibited the binding of (125)I-labeled cardiac actin to homologous antiserum, but neither brain actin inhibited the binding. Thus, the muscle actins possess at least one antigenic determinant not expressed by the brain actins, in addition to the shared determinants. Furthermore, cardiac actin and skeletal actin generated different inhibition curves in the cardiac actin radioimmunoassay, demonstrating that, although antigenically related, they are not identical. Correlations with existing sequence data imply that substitutions in only a few residues alter the antigenic properties of actin. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 4 |
| Volume Number | 77 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1980-07-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Actins Immunology Brain Muscles Myocardium Isolation & Purification Animals Epitopes Rabbits Radioimmunoassay Comparative Study Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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