Protein Concentrate From Normal and High‐lysine Corns by Alkaline Extraction: Composition and Properties

Protein concentrates and by‐products produced by alkaline extraction from ground corn having normal and high contents of lysine were analyzed for amino acid composition, protein, starch, fat, ash, fiber and various neutral carbohydrates A high‐lysine concentrate contained 65% protein (nitrogen × 6.25) with 4.7g lysine and 4.0g total sulfur amino acids per 16g nitrogen recovered. The minimum nitrogen solubility of the concentrates was 3–5% near pH 5.5. The protein concentrates has good functionality relative to their emulsifying activity, emulsion stability and hydration capacity.