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XB-ART-18462
J Neurophysiol 1996 Mar 01;753:1008-12. doi: 10.1152/jn.1996.75.3.1008.
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Relation between rise times and amplitudes of GABAergic postsynaptic currents.

Bier M , Kits KS , Borst JG .


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1. We recorded rise times and amplitudes of spontaneous GABAergic inhibitory postsynaptic currents (IPSCs) in melanotropes of Xenopus laevis. Average rise times did not vary with amplitude, but the rise times of larger IPSCs were less variable. A simple linear one-step Markov model for channel opening following the binding of a transmitter molecule can quantitatively account for the average rise time and its coefficient of variation as a function of amplitude. Our results indicate that the observed variations in the rise times are not due to variations in transmitter concentrations, but result from stochastic variations in the opening of the receptor channels.

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