This invention relates to substrates and methods for the visualization of intracellular organelles, such as the lysosome, peroxiosome, nucleus, Endoplasmic Reticulum and Golgi Apparatus, based upon organelle enzyme activity. Such compounds represent a novel combination of chemically distinct enzyme substrates with targeting and detection substrates which are activated by enzyme activity inside target organelles to produce a detectable signal. The organelle targeted enzyme substrates of this invention are designed to provide high fluorescence at lower pH values found in some organelles and can be used for monitoring enzyme activity inside cells at very low concentrations.
该发明涉及基于细胞器酶活性的底物和方法,用于可视化细胞内细胞器,如溶酶体、
过氧化物酶体、细胞核、内质网和高尔基体。这些化合物代表了具有
化学上不同的酶底物与靶向和检测底物的新型组合,这些底物受到靶细胞器内的酶活性的激活而产生可检测信号。该发明的细胞器靶向酶底物旨在在一些细胞器中发现的较低pH值下提供高荧光,并可用于监测细胞内酶活性的非常低浓度。