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Abstract

A process for preparing a sunflower seed protein isolate and a protein isolate which is obtainable by such process. The process comprises the following steps: mixing a defatted seed meal with an aqueous NaCl solution at a basic pH; separating said solubilised protein solution from solids; diafiltering said solubilised protein solution through an ultrafiltration membrane system using an aqueous NaCl diafiltration NaCl solution and at least 2 diavolumes of said aqueous NaCl diafiltration solution, diafiltering said NaCl-diafiltered protein; concentrating said purified protein solution; and drying said purified protein concentrate to obtain a protein isolate.

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