Ivanov I I, Karsanov N V, Magaldadze V A, Razamap L Iu, Rozenblium D Ia
Biull Eksp Biol Med. 1977 Sep;84(9):292-4.
Heat accompanying the interaction between relaxed and contracted glycerinized fiber bundles of the striated muscles of rats and ATP was measured. Investigation of the interaction concerned both relaxed and preliminarily contracted bundles. As apparent from the thermokinetic curves, the interaction of ATP with the noncontracted bundles yields a peak of the thermal potency which coincides in time with the contraction process; no such effect was produced in case of preliminarily contracted fibers. The authors conclude that a direct interrelationship exists between the rate of ATPase activity and the conformation of actomyosin system.
对大鼠横纹肌甘油化纤维束松弛状态与收缩状态相互作用时伴随的热量以及ATP进行了测量。对相互作用的研究涉及松弛束和预先收缩束。从热动力学曲线可以明显看出，ATP与未收缩束的相互作用产生了一个热效能峰值，其时间与收缩过程一致；而预先收缩的纤维则未产生这种效应。作者得出结论，ATP酶活性速率与肌动球蛋白系统的构象之间存在直接的相互关系。
