Abstract
The co-transport mechanism of amino acids with lipophilic anions through supported liquid membranes (SLMs), composed of o-nitrophenyl phenyl ether containing achiral or chiral crown ether, was investigated. The flux of amino acids mediated by achiral crown ether is described by a formula analogous to the Michaelis—Menten equation, except that the concentration product of amino acid and anion appears instead of the substrate concentration. Enantioselective transport of amino acids mediated by chiral crown ether is described by a flux equation analogous to the expression for competitive inhibition in enzyme kinetics. An SLM containing chiral crown ether is regarded as a good model of biological membranes.
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