Magnesium transport through the basal plasma membrane of larval malpighian tubules of Drosophila hydei studied by electron probe X-ray microanalysis.
Magnesium besides calcium is the most important excretion product. In the anterior Malpighian tubules of Drosophila, excretion of magnesium takes place via the hindgut by proteoglycan containing concretions. This study reports on magnesium transport through the basal plasma membrane of the principal cells of the proximal segment of the anterior Malpighian tubules. Measurements by electron probe X-ray microanalysis indicate the existence of two antiporters which transfer magnesium in still unknown stoichiometry from the hemolymph space into the cell: Mg/H and Mg/Na.
Wessing
Armin
A
Institut für Zoologie, Universität Giessen, Germany.
Zierold
Karl
K
D000584:Amiloride / Q000494:pharmacology; D000818:Animals; D001692:Biological Transport; D002462:Cell Membrane / Q000378:metabolism; D004330:Drosophila; D004577:Electron Probe Microanalysis / Q000379:methods; D008274:Magnesium / Q000378:metabolism* / Q000494:pharmacology; D008317:Malpighian Tubules / Q000378:metabolism* / Q000648:ultrastructure; D008855:Microscopy, Electron, Scanning; D008954:Models, Biological; D011522:Protons; D012964:Sodium / Q000494:pharmacology; D013997:Time Factors
D011522:Protons; D000584:Amiloride; D012964:Sodium; D008274:Magnesium