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  • Title: Na+-independent Mg2+ efflux from Mg2+-loaded human erythrocytes.
    Author: Günther T, Vormann J.
    Journal: FEBS Lett; 1989 Apr 24; 247(2):181-4. PubMed ID: 2541009.
    Abstract:
    Net Mg2+ efflux from Mg2+-loaded human erythrocytes was maximal after reincubation in sucrose. Net Mg2+ efflux was not inhibited by furosemide or bumetanide and, therefore, was not performed by the (Na,K,Cl)- or (K,Cl)-cotransport system. A component of net Mg2+ efflux was inhibited by extracellular NaC1, KCl, LiCl, choline Cl and SITS, in analogy to the inhibition of net Cl- and SITS. Therefore, it was concluded that net Mg2+ efflux is dependent on net Cl- efflux for charge compensation. Cl- -dependent net Mg2+ efflux was inhibited by amiloride. Only 10% of the maximal net Mg2+ efflux may depend on extracellular Na+.
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