These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Glutamate-operated postsynaptic channels and spontaneous excitatory postsynaptic currents in crayfish claw opener muscle.
    Author: Finger W.
    Journal: Neurosci Lett; 1983 Apr 11; 36(2):163-8. PubMed ID: 6135183.
    Abstract:
    In opener muscle fibres of the crayfish claw excitatory postsynaptic currents activated by glutamate (1 . 10(-4)-5 . 10(-4) mol/l) were investigated by means of the noise analysis technique. For the apparent mean open time of glutamate-activated channels, tau noise = 1.15 ms +/- 0.16 (S.D., n = 24) resulted at membrane potentials between E = -60 mV and E = -100 mV, T = 20-23 degrees C. No significant voltage dependence for tau noise was observed, most likely due to the pretreatment of the fibres with 1 mumol/l concanavalin A. For the conductance, gamma, of these channels, gamma = 23.6 pS +/- 5.2 (S.D., n = 24) was found. These characteristics for glutamate-operated channels differ significantly from those observed recently in opener muscle fibres of crayfish first walking leg [13]. Similarly, different characteristics were found also for the decay time constants tau (sEPSCs) of spontaneous excitatory postsynaptic currents in the respective muscles. On average, tau (sEPSCs) was 1.3 ms +/- 0.3 (S.D., n = 11) in the claw. In the first walking leg tau (sEPSCs) was shorter by a factor of about 2.4 and in the second walking leg shorter by a factor of about 2.9, than in the claw.
    [Abstract] [Full Text] [Related] [New Search]