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  • Title: Quantitative immunogold localization of dipeptidyl peptidase IV (DPP IV) in rat liver cells.
    Author: Fukui Y, Yamamoto A, Kyoden T, Kato K, Tashiro Y.
    Journal: Cell Struct Funct; 1990 Apr; 15(2):117-25. PubMed ID: 1972662.
    Abstract:
    We investigated ultrastructural localization of dipeptidyl peptidase IV (DPP IV) [EC3.4.14 5] in rat liver cells quantitatively by post embedding protein A-gold technique. In the hepatocyte, DPP IV was mainly localized on the bile canalicular surface and the lysosomal membranes, but were scarcely detectable on the sinusoid-lateral surface. A small number of DPP IV was also detected in the trans region of the Golgi apparatus, suggesting that this part may play important roles in intracellular transport or recycling of this enzyme. In the endothelial cell, DPP IV existed on the whole surface of the plasma membrane and the lysosomes. In the Kupffer cell DPP IV was mainly localized in lysosomes and a few were detected on the plasma membrane.
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