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- W2037150428 abstract "The preparation of rabbit antibodies uniquely specific for the alkali 1 (A1) and alkali 2 (A2) light chains of chicken pectoralis myosin has led to the direct isolation of two homodimeric species of myosin: A1-myosin and A2-myosin, molecules which contain the same light chain on each head. The existence of a heterodimeric species, containing both A1 and A2 light chains, was also inferred. The three types of alkali light chain isoenzymes occur in approximately equal amounts in adult chicken pectoralis muscle. The specificities of the antibodies were determined by modified Farr and solid phase radioimmunoassays, as well as by antibody-affinity chromatography. The determinants in myosin that are recognized by the purified antibodies appear to be confined to the N-terminal sequences of the alkali light chains. As a result of this narrow specificity, these immunological reagents can be used to characterize the distribution of A1 and A2 within the myosin molecule, and to localize the individual light chains within the muscle. By labeling the antibodies with a fluorescent marker we have shown that A1 and A2 are present within each myofibril, as well as within the same fiber (Lowey et al., 1979a). Moreover, by using goat anti-rabbit immunoglobulin to enhance the visualization of the primary antibodies against the light chains, we have demonstrated in the electron microscope that A1 and A2 co-exist along the length of each myofilament. This observation suggests that whatever functional differences may exist among the alkali light chain isoenzymes, they must operate within the constraints of a single filament." @default.
- W2037150428 created "2016-06-24" @default.
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- W2037150428 date "1981-05-01" @default.
- W2037150428 modified "2023-10-15" @default.
- W2037150428 title "Isolation and distribution of myosin isoenzymes in chicken pectoralis muscle" @default.
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- W2037150428 doi "https://doi.org/10.1016/0022-2836(81)90510-6" @default.
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