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The adsorption behaviour of various proteins (serum albumin, lysozyme, ribonuclease A, superoxide dismutase, myoglobin and α-lactalbumin) as a function of an externally imposed interfacial potential has been studied by reflectometry. The sorbent surface was a semiconducting indium tin oxide (ITO) layer deposited on a silicon wafer. At pH 4 and 7 the influence of the potential of the interface is...