The present invention provides a method for efficiently producing a γ-glutamyl-valyl-glycine crystal. Specifically, the present invention provides a method for producing a γ-glutamyl-valyl-glycine crystal, which includes the steps of: preparing a mixed solution of valyl-glycine or a salt thereof and γ-glutamyl-valyl-glycine, wherein the mixed solution contains valyl-glycine or the salt thereof in an amount of 20 mass% or more relative to the mass of γ-glutamyl-valyl-glycine; adjusting the amount of valyl-glycine or the salt thereof in the prepared mixed solution to 0.1 mass% or more and less than 20 mass% relative to the mass of γ-glutamyl-valyl-glycine to prepare a γ-glutamyl-valyl-glycine solution; and subjecting the γ-glutamyl-valyl-glycine solution to a crystallization procedure to produce the γ-glutamyl-valyl-glycine crystal.
本发明提供了一种高效生产γ-谷
氨酰-缬
氨酰-甘
氨酸晶体的方法。具体来说,本发明提供了一种生产γ-谷
氨酰-缬
氨酰-甘
氨酸晶体的方法,该方法包括以下步骤:制备缬
氨酰-甘
氨酸或其盐和γ-谷
氨酰-缬
氨酰-甘
氨酸的混合溶液,其中混合溶液中缬
氨酰-甘
氨酸或其盐的含量相对于γ-谷
氨酰-缬
氨酰-甘
氨酸的质量大于等于 20 质量%;将制备的混合溶液中缬
氨酰-甘
氨酸或其盐的含量调整为 0.1 质量%或更多,但相对于 γ-谷
氨酰-缬
氨酰-甘
氨酸的质量小于 20 质量%,以制备 γ-谷
氨酰-缬
氨酰-甘
氨酸溶液;并将 γ-谷
氨酰-缬
氨酰-甘
氨酸溶液进行结晶处理,以生成 γ-谷
氨酰-缬
氨酰-甘
氨酸晶体。