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The present work investigates the mechanism of binding of alpha-lactalbumin to the peptide ligand WHWRKR and its variants HWRKR and acetylated WHWRKR immobilized on a polymethacrylate chromatographic resin. The presence of two temperature-dependent binding mechanisms and one temperature-independent mechanism was demonstrated. Injections of different forms of alpha-lactalbumin (apo-alpha-lactalbumin, D87A mutant alpha-lactalbumin) displayed similar behaviors when compared to native alpha-lactalbumin, while lysozyme showed little or no binding to the WHWRKR and AcWHWRKR resins. An alternative process for isolation of alpha-lactalbumin from WPI was shown, using consecutive injections of WPI with limited elution.
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Gurgel et al. (2001) studied this question.
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