(Science: protein) fragments of myosin formed by trypsin digestion. Heavy meromyosin (HMM) has the hinge region and aTPase activity, light meromyosin (LMM) is mostly _ helical and is the portion normally laterally associated with other LMM to form the thick filament itself.
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Microfilament: Cytoplasmic filament, 5-7 nm thick, of F-actin (filamentous actin) that can be decorated with HMM (heavy meromyosin); may be laterally associated with other proteins (tropomyosin, α-actinin) in some cases, and may be anchored to the membrane. Microfilaments are ...
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