Key result
A goodness-of-fit test was developed to evaluate whether ion channels in a cellular membrane operate independently and consist of a small number of types, applied to simulated and biological data.
Provides a statistical methodology to analyze combined current records from cell patches to determine independent operation and mean behavior of ion channels.
Test for ion channel independence in patch data; leaves open clinical translation pending prospective validation.
Biological cell membranes contain molecular structures known as ion channels. The electrical activity of these channels regulates a number of cellular functions, such as heartbeat and neural transmission. Often the experimenter can only observe the combined current conducted through a cell patch containing an unknown number of ion channels, each channel of equal conductance. The observed current record is a step function with unit up or down steps occurring at random times. Based on such data, we obtain a goodness-of-fit test for the hypothesis that the channels in a portion of cellular membrane are operating independently, and that K types (K small) of channels exist in the membrane. If the hypothesis is accepted, estimates for the mean behaviour of each type of channel in the experiment are obtained. These techniques are applied to simulated and biological data.
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Dabrowski et al. (1992) studied this question. Statistical goodness-of-fit test was evaluated on Goodness-of-fit test for independent channel operation and K types of channels. A goodness-of-fit test was developed to evaluate whether ion channels in a cellular membrane operate independently and consist of a small number of types, applied to simulated and biological data.
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