Plant Physiol.
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Plant Physiology 54:368-371 (1974)
© 1974 American Society of Plant Biologists

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Articles

myo-Inositol 1-Phosphate Synthase Inhibition and Control of Uridine Diphosphate-D-glucuronic Acid Biosynthesis in Plants 1,2

Mary W. Loewus and Frank Loewus

a Department of Biology, State University of New York at Buffalo, Buffalo, New York 14214

Of the eight intermediates associated with the two pathways of UDP-D-glucuronic acid biosynthesis found in plants, only D-glucuronic acid inhibited myo-inositol 1-phosphate synthase (EC 5.5.1.4), formerly referred to as D-glucose 6-phosphate cycloaldolase. Inhibition was competitive. An attempt to demonstrate over-all reversibility of the synthase indicated that it was less than 5% reversible, if at all.

1 This work was supported by Grant GM-12422 from the National Institutes of Health.

2 This work is dedicated to Professor Otto Hoffmann-Ostenhof on the occasion of his 60th birthday.






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ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 1974 by the American Society of Plant Biologists