ほたて貝Actomyosinの粘度に関する研究 I. 支え筋のActomyosinについて

Under various conditions, we studied on the viscosity change of actomyosin solution, extractetd from small smooth adductor muscle of pecten (Yessensis Jay), and obtained the following results. 1) It is sure that this AM solution shows slow but remarkable increase of viscosity by warming, though this phenomenon disappears when it is purified. 2) This viscosity-increase occurs only when the warming temperature is higher than at 20℃. 3) This solution shows sudden and marked rise of viscosity by cooling, and decreases its value reversibly by warming again. Moreover, in such cases, it does not loose its specific activity as actomyosin. 4) The rate of this viscosity-increase is. proportional to the concentration of acto-myosin solutions. 5) We discussed the mechanism how the viscosity change appears. 6) We suppose that these curious viscoity change is not due only to actomyosin system, but it will be provoked by any other regulatory substances in this solution