Article,

Usefulness and limitations of linear approximations to the understanding of Ca++ signals.

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Cell Calcium, 24 (5-6): 345--357 (1998)

Abstract

Simple approximations to some limiting cases of Ca++ signalling provide insight into the complex problems of buffered diffusion and of Ca++ homeostasis in the presence of buffers. Three cases are presented, where the influence of Ca++ buffers can readily be understood in the limit of small signals: the return of global cellular Ca++ following a short stimulus in a 'Single Compartment', buffered diffusion along a cylindrical axon in the 'Rapid Buffer Approximation', and nonequilibrium microdomains of elevated Ca++ in the immediate vicinity of open Ca++ channels.

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