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Biophysical Journal 66: 161-168 (1994)
© 1994 the Biophysical Society

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Power spectra and cooperativity of a calcium-regulated cation channel.

M W McGeoch and J E McGeoch

PLEX Corporation, Brookline, Massachusetts 02146.

ABSTRACT

In this article we show that a channel complex of cooperatively interacting subunits can produce a power law spectrum with the slope of the spectrum depending on the strength of the cooperative interaction. The effects of cooperativity are explored via a computational model of a calcium-regulated cation channel for which new data is presented. The results, which concern "flickering" conductances, are correlated with prior work on critical fluctuations in the Ising model of ferromagnetism.




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Copyright © 1994 by the Biophysical Society.