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. 1971 Nov;11(11):924–943. doi: 10.1016/S0006-3495(71)86264-1

Passive Asymmetric Transport through Biological Membranes

Jerome S Schultz
PMCID: PMC1484074  PMID: 5113003

Abstract

The magnitude of passive diffusional solute transfer through artificial membranes is usually considered to be independent of the direction of the concentration gradient driving force. It can be shown, however, that a composite membrane, having as one component a membrane with a chemical reaction-facilitated diffusion transport mechanism, can result in an asymmetrical flux. An asymmetric flux caused by this type of structural heterogeneity may be one mechanism contributing to the asymmetric properties of biological membranes. Similar vectorial fluxes can be generated in interfacial solute transfer through membranes if hydrodynamic boundary layers occur at the membrane interface and reversible chemical reactions with the permeant species are involved in either phase.

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Selected References

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