Expressible juice showed highest increase within the second day of storage. Actomyosin was partially purified from stored muscles. Both reduced viscosity and Mg 2+ ‐ATPase activity of actomyosin decreased about 44% in the first day. These changes were due neither to actomyosin dissociation nor fragmentation of major proteins of the complex. Relative percentage of myosin decreased, and actin increased in actomyosin after the second day. These changes are related to a decrease in the myosin heavy chain and could explain the slow decrease in reduced viscosity and Mg 2+ ‐ATPase of this protein after the second day.
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Paredi et al. (1990) studied this question.
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