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 preserved for a long time and exhaustively washed (Fig. 2a).
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References
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KUMAGAI, H., EBASHI, S. & TAKEDA, F. Essential Relaxing Factor in Muscle other than Myokinase and Creatine Phosphokinase. Nature 176, 166 (1955). https://doi.org/10.1038/176166a0
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DOI: https://doi.org/10.1038/176166a0
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