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Journal of Experimental Biology 79,1-6 (1979)
Published by Company of Biologists 1979

Evidence that K-Dependent Transport Components in Addition to Na-K ATPase are Involved in Na and Cl Excretion in Marine Teleost Gills

P. PIC 1, J. C. ELLORY 2, and C. LUCU 3

1 Groupe de Biologie marine du Département de Biologie du Commissariat à l'Energie Atomique, Station Zoologique, 06230 Villefranche-sur-mer, France
2 Groupe de Biologie marine du Département de Biologie du Commissariat à l'Energie Atomique, Station Zoologique, 06230 Villefranche-sur-mer, France; Physiological laboratory, University of Cambridge, Great Britain
3 Groupe de Biologie marine du Département de Biologie du Commissariat à l'Energie Atomique, Station Zoologique, 06230 Villefranche-sur-mer, France; Institute ‘Ruder Boskovic’, Rovinj, Yugoslavia

Although Tl+ ions can substitute for K+ with a ten-fold higher affinity in activating the sodium pump in mullet red cells and mullet gill microsomal ATPase, they cannot mimic the effects of K+ in stimulating Na+ and Cl- efflux across the gill. This is interpreted in the light of an additional K+- sensitive transport component being involved.

Submitted on April 3, 1978






© The Company of Biologists Ltd 1979