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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Uptake of D-mannoheptulose by rat erythrocytes, hepatocytes and parotid cells.

D-[3H]mannoheptulose (or D-[1-14C] mannoheptulose) net uptake was measured in rat erythrocytes, parotid cells and hepatocytes. In the erythrocytes and parotid cells, the intracellular distribution space of the heptose (0.1 mM) represented only about 1 and 13%, respectively, of the intracellular 3HOH space. In hepatocytes, however, it amounted to approximately 45% of the intracellular 3HOH space. In all cases, the apparent distribution space of D-[3H]mannoheptulose hexaacetate largely exceeded that of unesterified D-[3H]mannoheptulose. Relative to the intracellular water space, the generation of acidic metabolites (expressed as an apparent distribution space) from radioactive D-mannoheptulose was one order of magnitude lower in parotid cells (< or = 3%) than in hepatocytes (> or = 20%). These findings are compatible with the hypothesis that D-mannoheptulose is transported into cells mainly, if not exclusively, at the intervention of GLUT2.[1]


  1. Uptake of D-mannoheptulose by rat erythrocytes, hepatocytes and parotid cells. Ramirez, R., Courtois, P., Ladriere, L., Kadiata, M.M., Sener, A., Malaisse, W.J. Int. J. Mol. Med. (2001) [Pubmed]
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