, Volume 39, Issue 5, pp 535–536 | Cite as

The response to potassium of the Na−K pump ATPase in low-K red blood cells from cattle at birth and in later life

  • P. Stucki
  • H. J. Schatzmann


It is shown that in low-K red blood cells of cattle the apparent affinity for K(1/K K app ) at an inhibitory site of the Na−K ATPase increases markedly during the first 3 months of life. This site probably is the Na accepting site at the internal membrane surface and the change in K K app reflects an increase inKNa/KK, the ratio of the true dissociation constants. This effect may explain the concomitant fall in cellular K concentration.


Potassium Blood Cell Membrane Surface Dissociation Constant Apparent Affinity 
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Copyright information

© Birkhäuser Verlag 1983

Authors and Affiliations

  • P. Stucki
    • 1
  • H. J. Schatzmann
    • 1
  1. 1.Department of Veterinary PharmacologyUniversity of BernBern(Switzerland)

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