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The axosomatic contacts on the bursting neuron of the snailHelix pomatia. II. ultrastructural localization of adenylate cyclase

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Summary

  1. 1.

    Fluoride and peptide-stimulated adenylate cyclase activity was investigated by electron histochemistry on serial sections of the RPAI neuron of the snailHelix pomatia.

  2. 2.

    Fluoride-stimulated adenylate cyclase was detected in the surface membrane of the RPAI neuron, the postsynaptic membrane of axosomatic contacts, and the surface of glial cells forming a multilayer capsule around the neuron.

  3. 3.

    Peptide-stimulated adenylate cyclase was located in the membrane of glial cells surrounding the neuron, their processes (trophospongia) invaginating deeply in the neuronal soma, and the membrane of somatic protrusions forming the system of lacoons in the region of the axosomatic contact.

  4. 4.

    No peptide-stimulated adenylate cyclase was revealed in the remaining part of the surface of the somatic membrane.

  5. 5.

    The localization of adenylate cyclase activity in the postsynaptic membrane in the region of the axosomatic contact is in accordance with the hypothesis based on electrophysiological experiments that the cyclase system participates in the genesis and regulation of the bursting activity of the RPAI neuron.

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Authors and Affiliations

  1. Department of General Physiology of the Nervous System, A. A. Bogomoletz Institute of Physiology, Academy of Sciences of the Ukrainian S.S.R., Kiev, U.S.S.R.

    Larissa M. Koval, Nikolai I. Kononenko & Galina G. Skibo

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  1. Larissa M. Koval
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  2. Nikolai I. Kononenko
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  3. Galina G. Skibo
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Koval, L.M., Kononenko, N.I. & Skibo, G.G. The axosomatic contacts on the bursting neuron of the snailHelix pomatia. II. ultrastructural localization of adenylate cyclase. Cell Mol Neurobiol 4, 43–52 (1984). https://doi.org/10.1007/BF00710941

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  • DOI: https://doi.org/10.1007/BF00710941

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