title: Investigation on the binding of tryptophan enantiomers to human serum albumin.
abstract: The binding of radiolabelled tryptophan enantiomers to human serum albumin was investigated by ultrafiltration and by the microparticle technique. L-Trp was found to exhibit a high degree of secondary binding. D-Trp showed increased degree of binding when the HSA concentration was decreased. Stereoselective binding has also been detected in stereoselectively labelled racemic mixtures. Both L- and D-Trp were found to compete for the primary binding site with specific benzodiazepine markers. All the experiments indicate that stereoselectivity of binding is much lower than generally believed.
mesh_terms: D001665:Binding Sites; D001667:Binding, Competitive; D006801:Humans; D066298:In Vitro Techniques; D007700:Kinetics; D012709:Serum Albumin / Q000378:metabolism*; D013237:Stereoisomerism; D014364:Tryptophan / Q000378:metabolism*
chemical_list: D012709:Serum Albumin; D014364:Tryptophan