Plant Physiol. Drug Metab Dispos
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Plant Physiology 58:283-287 (1976)
© 1976 American Society of Plant Biologists

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Articles

An NADP-dependent Glutamate Dehydrogenase in Chloroplasts from the Marine Green Alga Caulerpa simpliciuscula1

Kenwyn R. Gayler and Wayne R. Morgan

a Russell Grimwade School of Biochemistry, University of Melbourne, Parkville, Victoria 3052, Australia

NADP-dependent glutamate dehydrogenase was partially purified from extracts of the marine siphonous green alga Caulerpa simpliciuscula. The enzyme had an apparent Km NH4+ of 0.4 to 0.7 mM and was highly specific for NADPH, {alpha}-ketoglutarate, and ammonium ions.

The bulk of the NADP-glutamate dehydrogenase was isolated with the chloroplast fraction in cell-free preparations of this alga and was released from these "chloroplast fractions" as a soluble enzyme on gentle lysis of chloroplast membranes.

1 This work was supported by the Australian Research Grants Committee.






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