Plant Physiol. Journal of Pharmacology and Experimental Therapeutics
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Plant Physiology 55:849-852 (1975)
© 1975 American Society of Plant Biologists

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Transport of Metabolites across Isolated Envelope Membranes of Spinach Chloroplasts

Raymond P. Poincelot

Department of Biochemistry, The Connecticut Agricultural Experiment Station, New Haven, Connecticut 06504

Isolated envelope membranes of spinach chloroplasts (Spinacia oleracea L. var. Viroflay) exhibited selective permeability. Metabolites such as 3-phosphoglycerate, bicarbonate, glyoxylate, and acetate were transported rapidly; 6-phosphogluconate, glycolate, glycine, L-malate, and succinate were intermediate; whereas glucose 6-phosphate, fructose 1,6-diphosphate, and sucrose were hardly transported. Transport rates, metabolite accumulations within the membrane vesicles, and the internal water volume of isolated and in situ envelope membranes were compared and found to show similar trends.






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Copyright © 1975 by the American Society of Plant Biologists