Abstract
125I-insulin was shown to be internalized in vivo to a discrete population of low-density membranes (ligandosomes), distinct from the Golgi, endoplasmic reticulum, plasma membrane, and lysosomes. However, analytical subcellular fractionation shows that glutathione-insulin transhydrogenase is localized to the endoplasmic reticulum. Measurement of the specific enzyme activity of glutathione-insulin transhydrogenase showed no differences between normal, diabetic, and hyperinsulinaemic rats. These results suggest that glutathione-insulin transhydrogenase is not directly involved in the subceltular processing of receptor-bound internalized insulin.
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Chowdhary, B.K., Smith, G.D., Mahler, R. et al. Studies on the subcellular localization and role of glutathione-insulin transhydrogenase in rat liver. Biosci Rep 3, 323–329 (1983). https://doi.org/10.1007/BF01122896
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DOI: https://doi.org/10.1007/BF01122896