Essential Relaxing Factor in Muscle other than Myokinase and Creatine Phosphokinase
Abstract
EXTRACTS of rabbit skeletal muscle contain factors which play a part in the relaxation of muscle fibre models, such as glycerinated fibres1–3. Two of them isolated have been identified with known enzymes: myokinase by Bendall4 and creatine phosphokinase by Lorand5. But these two enzymes, coupled with their co-factors, do not settle all the problems of muscular relaxation because, in the light of our experiments, they do not have any relaxing effect on glycerinated fibres which have been...