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Effect of aging on the composition of mitochondrial membranes from potato solanum tuberosum cultivar bintje slices



Effect of aging on the composition of mitochondrial membranes from potato solanum tuberosum cultivar bintje slices



Phytochemistry 19(2): 211-214



The phospholipid content of mitochondrial membranes from slices of potato tuber (S. tuberosum) remains stable during aging. The phospholipid compositions of whole mitochondria and inner membranes do not vary during aging whereas the concentrations of phosphatidylinositol and phosphatidylglycerol in outer membranes are slightly amplified. The saturation of outer membrane fatty acids is slightly increased during aging. Gel electrophoresis of mitochondrial membrane proteins show slight variations of one polypeptide in outer membranes and of 3 polypeptides in inner membranes. These results suggest parallel variations of lipids and proteins in membranes during aging, in marked contrast with the large modifications observed in mitochondrial activities.

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