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  • Title: Immunofluorescent localization of glycogenolytic and glycolytic enzyme proteins and of malate dehydrogenase isozymes in cross-striated skeletal muscle and heart of the rabbit.
    Author: Dölken G, Leisner E, Pette D.
    Journal: Histochemistry; 1975; 43(2):113-21. PubMed ID: 124716.
    Abstract:
    Specific antisera against glycogen phosphorylase, phosphofructokinase, aldolase, glyceraldehyde-phosphate dehydrogenase, enolase, lactate dehydrogenase, cytosolic and mitochondrial malate dehydrogenase from rabbit muscle were obtained from sheep. The gamma-globulins were used for indirect immunofluorescent localization of the respective enzymes in rabbit skeletal muscle and heart. In stretched skeletal muscle a cross-striation like distribution was observed for all enzymes studied. In the case of mitochondrial malate dehydrogenase this pattern is due to the staining of I-band mitochondria. In cross-sections, an intense staining of the sarcolemma and of subsarcolemmal mitochondria was observed. Comparative analyses with polarized light revealed that the cytosolic enzymes under study are distributed in the relaxed muscle fibre predominantly within the isotropic zones. The same distribution holds also for heart. In contracting muscle a decrease in cross-striated fluorescence and a faint staining of the interfibrillar spaces suggests a location also within the interfibrillar space.
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