Model of Active Transport of Ions Through Diatom Cell Biomembrane |
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Authors: | A V Melkikh D S Bessarab |
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Institution: | (1) Marine Botany (FB2), University of Bremen, PO Box 330 440, 28334 Bremen, Germany;(2) Max-Planck-Institute for Marine Microbiology, Celsiusstr. 1, 28359 Bremen, Germany |
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Abstract: | A model of the active transport of ions in the Cascinodiscus wailesii diatom cell is constructed taking into account the transport of H+, Na+, K+, Ca+2, NO3-\mathrm{NO}_{3}^{-}, Cl−, and NH4+\mathrm{NH}_{4}^{+} ions. This model allows calculating intracellular concentrations of basic ions and the biomembrane resting potential. A hierarchical
algorithm “one ion—one transport system” is used in the model. The dependence of the resting potential on the extracellular
concentration of potassium is plotted in terms of the model. The calculated values are in good agreement with the corresponding
experimental data. |
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