title: Tryptophan, Tryptophan-Leucine, and BSA Adsorption at an Oil-Water Interface
abstract: Adsorption of the amino acid tryptophan, the peptide tryptophan-leucine and the protein bovine serum albumin (BSA) at buffered water-oleyl alcohol interfaces has been studied by ellipsometry. Tryptophan-leucine solutions showed a systematic change in ellipticity with concentration indicating an adsorption of 0.5 mg/m2 for a solution concentration of 1 g/L and evidence of saturation at that concentration. BSA showed an adsorption of 0.45 mg/m2 for a concentration of 3.5 g/L with no sign of saturation. There appeared to be little adsorption of tryptophan at the interface.
authors.affiliation: Physics Department, Victoria University of Wellington, Wellington, New Zealand
authors.initials: D
authors.lastname: Beaglehole
authors.initials: F
authors.lastname: Lawson
authors.initials: G
authors.lastname: Harper
authors.initials: M
authors.lastname: Hossain