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The iron-binding activities of components in soy sauce were examined by using gel filtration chromatography. Soy sauce was separated into 5 fractions (P1-P5) by Sephadex G-25 column chromatography monitored by the absorbance at 275 and 400nm. Iron in soy sauce was mainly bound to high-molecular-weight components (P1 and P2). Simulated soy sauce consisting of sugars, amino acids, organic acids, and minerals was analyzed by the same column chromatography. Iron in the simulated soy sauce wasdoi:10.3136/nskkk.42.344 fatcat:tqawrmflpfdfllzyok7mghfhya