J P Desmazès

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The membrane potential of isolated rat neurohypophyses and isolated neurosecretosomes (neurosecretory nerve endings) was monitored with the voltage sensitive fluorescent probe diS-C3-(5). K ions, in contrast to Na or Cl ions, give rise to large changes of the fluorescent signal. The fluorescent response is linearly related to log[K+]0 at values higher than(More)
The role of the calcium ion Ca2+ as an agent of intracellular control in a variety of physiological processes is well established. In vertebrate skeletal muscle fibers, Ca2+ is involved in muscle contraction, modulation of membrane permeability and regulation of metabolic activity. Recently it was suggested that ion fluxes through membranes regulate the(More)
Current- and voltage-clamp experiments on Myxicola giant axons labelled with pyrene showed decreased Na+ and K+ conductances. The low-frequency membrane capacity and the gating charge transfer were slightly reduced. It may be inferred that pyrene is incorporated in some hydrophobic membrane domains close to the ionic channels.
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