DEMONSTRATION OF HISTONASE WITH FLAVIANIC ACID
1 Department of Internal Medicine (Simpson Memorial Institute), The Unversity of Michigan Medical School, Ann Arbor, Michigan 48104
A method was developed to demonstrate histonase activity in the cytoplasm of polymorphonuclear leukocytes, eosinophils and monocytes. The technique was based on the ability of flavianic acid (2,4-dinitro-l-naphthol-7-sulfonic acid) to form highly insoluble salts with arginine. Presumably, the source of the free arginine was from histone proteolysis as a result of the action of histonase. Submitted on April 1, 1974Revised on July 5, 1974
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