Monotonic and non-monotonic single channel open time distributions with two sequential open states.
Some conditions under which kinetic schemes including two sequential open states of identical conductance will display a non-monotonic (i.e. with a deficit of short open times and a maximum at t greater than 0) distribution of single channel open times are described theoretically. Neither a closed cyclic scheme nor exclusively irreversible transitions between states are required for non-monotonic distributions. A required condition for the schemes considered here is that all openings are to a state from which closing is not possible. It is the presence of a precursor process to channel closing that produces the non-monotonic distribution. Following each channel opening some time is required for a transition into the second open state from which all closings proceed. Simple schemes of this sort cannot provide the basis of any experimental reports of non-monotonic distributions.
Goldman
L
L
I. Physiologisches Institut, Universität des Saarlandes, Homburg, Federal Republic of Germany.
D007473:Ion Channels / Q000502:physiology*; D007700:Kinetics; D008433:Mathematics; D008962:Models, Theoretical
D007473:Ion Channels