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Showing 1 to 6 of 6 for “"crossbridges"”.
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Activation of smooth muscle and theories of contraction
… NT$\sb3$ and NT$\sb4$, where N is the number of crossbridges, and T$\sb3$ and T$\sb4$ are the tension of phosphorylated and dephosphorylated crossbridges, respectively. The mathematical solution, for any state, is made of the sum of three weighted exponentials plus a constant term. The parameters …
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Studies on actomyosin crossbridge flexibility using a new single molecule assay.
… compared to myosins attached through two crossbridges, which indicates that most of the torsional flexibility resides in the myosin subfragment-2, and thus the hinge between subfragment-2 and light meromyosin should contribute the most to this flexibility. The comparison of torsional …
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Evidence for Absence of Latchbridge Formation in Phasic Saphenous Artery
… indefinitely by formation of slowly cycling crossbridges (latchbridges) that maintain force at a high energy economy. To fully understand the uniqueness of mechanisms regulating tonic arterial contraction, comparisons have been made to phasic visceral smooth muscles that do not sustain high …
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Conformational Studies of Myosin and Actin with Calibrated Resonance Energy Transfer
… of the weakly and strongly attached crossbridges which appear to result from a conformational selection that occurs during the weak binding of the myosin head to actin. The resonance energy transfer data exclude a number of versions of the swinging lever arm model, and indicate that …
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Structure of Cross-Bridges in Vertebrate Skeletal Muscle Activated by Photolysis of Caged Ca2+
… layer line, supports the view that at least some crossbridges decorate the thin filament during contraction with an act in based set of periodicities, but not to the same degree as is seen in rigor. The lateral spread of the 1/ 143 Å-1 meridional spot indicates a disorder of axial coherence among …
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Nuove osservazioni sulla biomeccanica dell’uretere umano
The function of ureter is to transport the urine from the kidney to the urinary bladder. Ureteral peristalsis, the principal motor event that propels urine along the ureter, is the result of coordinated contractions of longitudinal and circular smooth muscle inside the organ wall. Alterations of …