sarcomere skeletal filament tissue labeled myosin actin contraction mechanism movement biology
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contraction actin myosin bridge cuny filament tropomyosin atp triggered binding active filaments
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contraction relaxation skeletal calcium fibre actin binds atp myosin
myosin actin dimer bound shown trailing
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myosin actin skeletal muscle contraction during fiber system sliding over choose board
myotubes differentiation immunofluorescence differentiated myosin myogenin desmin mitochondrial sarcomere myhc
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actin myosin cytoskeleton filaments structure function heads cell muscle biology thin thick organization bone definition interact figure