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    • 3. 发明授权
    • Compositions for the detection of enzyme activity in biological samples and methods of use thereof
    • 用于检测生物样品中酶活性的组合物及其使用方法
    • US07879574B2
    • 2011-02-01
    • US11941766
    • 2007-11-16
    • Beverly S. PackardAkira Komoriya
    • Beverly S. PackardAkira Komoriya
    • C07K7/00C12Q1/37
    • C07K7/06C07K7/08C12Q1/37G01N33/542G01N2333/96469
    • The present invention provides for novel reagents whose fluorescence increases in the presence of particular proteases. The reagents comprise a characteristically folded peptide backbone conjugated to two fluorophores such that the fluorophores are located opposite sides of a cleavage site. When the folded peptide is cleaved, as by digestion with a protease, the fluorophores provide a high intensity fluorescent signal at a visible wavelength. Because of their high specificity and their high fluorescence signal in the visible wavelengths, these protease indicators are particularly well suited for detection of protease activity in biological samples, in particular in frozen tissue sections. Thus this invention also provides for methods of detecting protease activity in situ in frozen sections.
    • 本发明提供了在特定蛋白酶存在下荧光增加的新型试剂。 试剂包含与两个荧光团缀合的特征性折叠的肽主链,使得荧光团位于切割位点的相对侧。 当折叠的肽被切割时,通过用蛋白酶消化,荧光团提供可见波长的高强度荧光信号。 由于它们的高特异性和在可见波长中的高荧光信号,这些蛋白酶指示剂特别适用于检测生物样品中的蛋白酶活性,特别是在冷冻组织切片中。 因此,本发明还提供了在冷冻切片中原位检测蛋白酶活性的方法。