PROBLEM TO BE SOLVED: To solve the problem that a safely-ingestible rice protein composition having a low content of cadmium is desired, since it is reported that domestically produced rice has a higher content of cadmium in comparison with rice produced in various foreign countries, and that most of cadmium is in the bonded state to protein in rice albumen and cadmium is concentrated in 6-12 times in separated protein.SOLUTION: Alkali extraction liquid of rice protein is neutralized, and the rice protein is gelatinized at a temperature of 80°C or higher. Since the gelatinized rice protein is insoluble in water even in an acid condition, cadmium can be removed therefrom by being cleaned in a condition of pH 5.0 or lower, to thereby provide a rice protein composition having a low content of cadmium.COPYRIGHT: (C)2015,JPO&INPIT【課題】国内産の米は諸外国産の米と比較してカドミウムの含有量が高く、米胚乳中ではカドミウムの多くはタンパク質と結合した状態であり、分離したタンパク質にカドミウムが6~12倍濃縮されるとの報告があるため、カドミウム含量が低く安全に摂取できる米タンパク質組成物が望まれる。【解決手段】米タンパク質のアルカリ抽出液を中和し、その後80℃以上の温度で米タンパク質をゲル化させる。ゲル化した米タンパク質は酸性条件でも水に不溶なため、pH5.0以下の条件で洗浄することでカドミウムを除去することができ、カドミウム含量が低い米タンパク質組成物が提供される。【選択図】なし
