抄録
1. The relation between the KCl concentration (10mM to 210mM KCl) andthe relaxation of glycerol-extracted muscle fibers induced by various relaxingfactors was demonstrated.
2. At each KCl concentration, the relaxation of fibers varied at most 3-6%in the Dowex A-1-pretreated reaction mixture and it was also 5-9%, even inthe reaction mixture to which a sufficient amount of Dowex A-1 was directlyadded.
3. 0.05mM EDTA caused markedly the fibers to relax independently on the KCl concentration.
4. The relaxation of fibers induced by 0.05 mg of microsomes per ml wasremarkable at relatively low KCl concentration, especially at 70mM KCl.
