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  • Title: Immunofluorescence comparisons of anti-actin specificity.
    Author: Spooner BS, Holladay CR, Bright GR.
    Journal: Eur J Cell Biol; 1982 Aug; 28(1):115-21. PubMed ID: 6181997.
    Abstract:
    The abilities of antibody populations against brain actin and two immunogenic forms of cardiac actin to react with sarcomeric muscle actin and cytoplasmic non-muscle actin were tested by indirect immunofluorescence, by using isolated skeletal muscle myofibrils and cultured non-neuronal dorsal root ganglion cells as the test systems. All three antibody preparations stained the I-bands of myofibrils, a result that demonstrated the presence of antigenic determinants shared among skeletal, cardiac, and brain actins. However, although antibodies against cytoplasmic brain actin stained the stress fibers of cultured cells, those against glutaraldehyde cross-linked cardiac actin did not, a result that implies that cardiac actin possesses determinants common to sarcomeric actins but not present on cytoplasmic actin. Finally, antibodies against SDS-treated cardiac actin readily stained the stress fibers of cultured cells, in contrast to those against glutaraldehyde cross-linked cardiac actin, a result that suggests that the state of the original immunogen can affect the actin type specificity of the resulting antibody population.
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