[The effect of N-bromoacetamide on the components of sodium channel inactivation in the membrane of Ranvier's node].

In voltage clamp experiments on the frog Ranvier node, the specific protein reagent, N-bromacetamide, significantly decelerates the sodium inactivation kinetics and makes it incomplete. After treatment with N-bromacetamide, both fast and slow inactivation time constants are increased and the proportion of inactivation components is changed favouring the slowly inactivating one in the wide range of membrane potentials. The results are consistent with a single channel population following the 3-state model of inactivation.