Plant Physiol. Journal of Pharmacology and Experimental Therapeutics
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Plant Physiology 69:1404-1406 (1982)
© 1982 American Society of Plant Biologists

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Articles

Light Modulation of Phosphofructokinase in Pea Leaf Chloroplasts 1

Bruria Heuer2, Martha J. Hansen and Louise E. Anderson3

University of Illinois at Chicago Circle, Box 4348, Chicago, Illinois 60680

Chloroplastic phosphofructokinase, phosphorylase, phosphoglucomutase, and phosphoglucoisomerase in peas are light inactivated. The effect of light on phosphofructokinase is mimicked by dithiothreitol. DCMU, arsenite, and sulfite inhibit light modulation of the enzyme. No effect of light inactivation on the Km (fructose-6-P) or pH optima of phosphofructokinase was observed.

2 Permanent address: Department of Stress Physiology, Institute of Soils and Water, Agricultural Research Organization, Volcani Center, P. B. Box 6, Bet Dagan 50200, Israel.

3 Address reprint requests to this author.

1 Supported by National Science Foundation Grant 80-05618 and Department of Energy Contract EP 78-S-02 1961.






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