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Plant Physiology 59:1-3 (1977)
© 1977 American Society of Plant Biologists

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Articles

Plant Pyruvate Dehydrogenase Complex

II. ATP-Dependent Inactivation and Phosphorylation 1

Douglas D. Randall and Paul M. Rubin

a Department of Biochemistry, University of Missouri, Columbia, Missouri 65201

ATP inactivated plant pyruvate dehydrogenase complex (PDC) from broccoli (Brassica oleracea) mitochondria. ATP inactivation of the complex was time-dependent and proportional to the ATP concentration. Time-dependent incorporation of 32P from [{gamma}32P]ATP into trichloroacetic acid-precipitable protein corresponded to the inactivation of the PDC. It is concluded that plant PDC is phosphorylated and inactivated by a PDC kinase.

1 This investigation was supported by National Science Foundation Grant BMS 75-08107. Missouri Agriculture Experiment Station Series No. 7567.






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ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 1977 by the American Society of Plant Biologists