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Plant Physiology 53:1-4 (1974) © 1974 American Society of Plant Biologists Intracellular Distribution of Hydroperoxide Isomerasea Department of Biochemistry and Division of Natural Sciences, North Dakota State University, Fargo, North Dakota 58102
Differential centrifugation of several plant extracts indicates that the majority of the hydroperoxide isomerase activity is present in the cytoplasm of the cell. However, lesser amounts of isomerase activity were found in the mitochondrial and microsomal fractions of sunflower seedlings. Sucrose density gradient centrifugation of extracts from sunflower, watermelon, and flax seedlings and from cauliflower buds showed that isomerase activity was associated with the mitochondria. There was no evidence for presence of hydroperoxide isomerase activity in the microbodies.
1 Research Chemist, Agricultural Research Service, United States Department of Agriculture, in cooperation with the North Dakota Agricultural Experiment Station. Journal Article 437. 2 Graduate Fellowship, supported by National Defense Education Act IV.
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