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Journal Article

Kinetics and Energetics of Light-Driven Chloroplast Glutamine Synthesis

Cary A. Mitchell and C. Ralph Stocking
Plant Physiology
Vol. 55, No. 1 (Jan., 1975), pp. 59-63
Stable URL: http://www.jstor.org/stable/4263867
Page Count: 5

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Topics: Chloroplasts, Plastids, Nitrogen, Plants, Peas, Spinach, pH, Photosynthesis, Photophosphorylation, Amino acids
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Kinetics and Energetics of Light-Driven Chloroplast Glutamine Synthesis
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Abstract

Chloroplasts contain the enzyme glutamine synthetase. Formation of glutamine by isolated chloroplasts is light-dependent and requires an intact outer envelope. Addition of exogenous glutamic acid, as well as nitrogen donors such as nitrite or ammonium, stimulate the synthesis of this amide. Photosynthetic generation of ATP satisfies the light requirement of glutamine synthesis. The process is supported by cyclic as well as noncyclic photophosphorylation.

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