A procedure has been described for the centrifugal fractionation of the cytological components of pigeon breast muscle. An analysis of the distribution of enzyme activity among the different particles reveals a predominant location of magnesium-activated ATPase and myokinase in the cytochondria. The myofibrillar nuclear components are the site of calcium-activated ATPase and adenylic acid deaminase.
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Copyright, 1953, by The Rockefeller Institute for Medical Research New York
1953
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