Properties of Protein-mediated Transport More rapidly than by simple diffusion Saturation kinetics: as the concentration of the transported compound is increased, the rate of transport at first increases, but eventually a concentrations reached after which the transport rate increases no further Chemical specificity: only molecules with the requisite chemical structure are transported Competitive inhibition: structurally related molecules may compete for transport➢ Properties of Protein-mediated Transport • More rapidly than by simple diffusion • Saturation kinetics: as the concentration of the transported compound is increased, the rate of transport at first increases, but eventually a concentrations reached after which the transport rate increases no further. • Chemical specificity: only molecules with the requisite chemical structure are transported. • Competitive inhibition: structurally related molecules may compete for transport