CREATINE KINASE IN NORMAL AND DYSTROPHIC MOUSE MUSCLE

The hind leg muscle of normal mice and mice with hereditary muscular dystrophy was taken for individual analyses of the creatine-phosphorylating enzyme, creatine kinase. Creatine kinase activity was always found to be higher in the muscle of normal mice than in that of dystrophic mice, and the values in each group decreased with increasing age of the mice. The difference was greatest in mice of 2 weeks of age, and in the light of these findings some suggestions are made about the pathogenesis of muscular dystrophy.