| 摘要 |
The present invention provides a method for efficiently producing a ³-glutamyl-valyl-glycine crystal. Specifically, the present invention provides a method for producing a ³-glutamyl-valyl-glycine crystal, which includes the steps of: preparing a mixed solution of valyl-glycine or a salt thereof and ³-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 ³-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 ³-glutamyl-valyl-glycine to prepare a ³-glutamyl-valyl-glycine solution; and subjecting the ³-glutamyl-valyl-glycine solution to a crystallization procedure to produce the ³-glutamyl-valyl-glycine crystal. |
