The enzyme substrate according to this invention has within its molecule both a group to be cleaved by an enzyme reaction and a group that forms a strongly fluorescent coumarin derivative through intramolecular lactonization when cleaved by the enzyme reaction. Furthermore, the method for determining an enzyme activity according to this invention comprises conducting the enzyme reaction by the use of the enzyme substrate of the invention and determining the enzyme activity by means of the measurement of fluorescence of the coumarin derivative formed.
根据本发明的酶底物在其分子内既有一个将被酶反应裂解的基团,又有一个在被酶反应裂解时通过分子内内酯化形成强荧光
香豆素衍
生物的基团。此外,根据本发明确定酶活性的方法包括使用本发明的酶底物进行酶反应,并通过测量所形成的
香豆素衍
生物的荧光来确定酶活性。