Function of the outer membrane of Escherichia coli as a permeability barrier to beta-lactam antibiotics.

Abstract

On the basis of a simple theoretical model, the ease of penetration of beta-lactam antibiotics through the outer membrane of Escherichia coli was measured. The cell envelope was found to act as a diffusion barrier to both penicillins and cephalosporins. The validity of the model and the cooperative action of cell-bound beta-lactamase and outer membrane were… (More)

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