Bond rupture mechanism enables to explain in block asymmetry of elaxation, force-velocity curve and the path of energy dissipation in muscle

نویسنده

  • Eugene V. Rosenfeld
چکیده

В середине пятидесятых годов прошлого века были достигнуты огромные успехи в понимании механизма мышечного сокращения, см. Huxley A F (2000). Было установлено (Huxley H E 1953; Huxley H E & Hanson 1954; Huxley A F & Niedergerke 1954; Huxley H E (1957)) that shortening of the muscle fibre takes place by relative sliding movement of two sets of filaments – actin (AF) and myosin (MF) lines. Выяснилось, что они приводятся в движение за счет циклической конформации myosin heads (MHs), которые последовательно attach to AF forming a cross-bridge, совершают гребковое движение (hoetype) и снова отделяются. В каждом цикле мостик движется и совершает механическую работу за счет энергии, получаемой при гидролизе одной молекулы ATP, и КПД of the chemo-mechanical transduction зависит от скорости сокращения мышцы. Первая феноменологическая теория, построенная на основе этих данных, была создана by Huxley A F (1957). В ней предполагалось, что в начале каждого цикла MH получает в результате гидролиза ATP запас энергии ATP E , которая затем по мере

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تاریخ انتشار 2015