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Quarterly Journal of Experimental Physiology 70.4 pp 567-573
© The Physiological Society 1985
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THE EFFECT OF DINITROPHENOL ON MAGNESIUM TRANSPORT ACROSS AN ISOLATED PREPARATION OF SHEEP RUMEN EPITHELIUM

H. Martens 1

1 Department of Physiology, School of Veterinary Medicine, D-3000 Hannover 1, Bischofsholer Damm 15, F.R.G.

Mg transport across an isolated preparation of sheep rumen epithelium was studied in vitro. The efflux (flux from the mucosal side to serosal side) and the influx (flux with serosal to mucosal side) were estimated with 28Mg. Under physiological conditions a significant net efflux of Mg was observed, in which the unidirectional efflux was seven to eight times that of the influx. In experiments where ATP synthesis was blocked by the addition of dinitrophenol, Mg efflux was reduced to that of the influx. These observations support the conclusion that Mg absorption across the rumen wall of the sheep is an active process.

Submitted on February 19, 1985






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Copyright © 1985 by the The Physiological Society.