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False interpretation of membrane transport data due to osmotic volume changes of cells

  • Physiologica
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Summary

It is shown theoretically that in a nonsaturable transport system across a cell membrane, the kinetical analysis yields (erroneously) apparent saturation kinetics if osmotic volume changes of the cell occur and are not taken into account. Experimentally this is illustrated for the case of exit of glycerol from beef erythrocytes.

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References

  1. G. F. Fuhrmann, P. Liggenstorfer and W. Wilbrandt, Experientia27, 1428 (1971).

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  2. H. Lineweaver and D. Burk, J. Am. Chem. Soc.56, 658 (1934).

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Authors and Affiliations

  1. Pharmakologisches Institut der Universität Bern, Friedbühlstrasse 49, CH-3008, Bern, Switzerland

    W. Wilbrandt & G. F. Fuhrmann

Authors
  1. W. Wilbrandt
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  2. G. F. Fuhrmann
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Wilbrandt, W., Fuhrmann, G.F. False interpretation of membrane transport data due to osmotic volume changes of cells. Experientia 33, 1472–1474 (1977). https://doi.org/10.1007/BF01918815

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  • DOI: https://doi.org/10.1007/BF01918815

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