| 摘要 |
Provided is a method for determining activity of arylsulfatase in an aqueous system, which comprises a step in which arylsulfatase is subjected to reaction with a substrate, from which fluorophore or chromophore is liberated by suffering an action of the arylsulfatase, in an aqueous reaction system having high ionic strength. Also, provided are a lactase preparation having a lactase activity of 4,000 NLU/g or more according to the FCC IV method and having an arylsulfatase activity of 0.1% or less of the lactase activity as the basis, in which the arylsulfatase activity has been determined by the method for determining activity of arylsulfatase in an aqueous system according to the fluorescence method of the present invention; a method for producing this preparation; and a dairy product which comprises using this preparation. |
