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AbstractAminopeptidases are exopeptidases that selectively release N-terminal amino acid residues from polypeptides and proteins. Bacteria display several aminopeptidasec activities which may be localised in the cytoplasm, on membranes, associated with the cell envelope or secreted into the...
AbstractThe blood-brain barrier (BBB) is formed by the tight junctions of the cerebral capillary endothelium and the choroid plexus epithelium. The molecular anatomy of the tight junction resembles that of a polarized, transporting epithelium, suggesting some model cell culture systems can...
AbstractFree-living bacteria are expert in adapting to variations in nutrient availability, often using an array of transport systems of different affinities to scavenge for particular substrates (multiport). This review concentrates on the regulation of expression of different transporters...
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