BioTracker Orange-NHS Live Cell pH dye is a chemical probe which reversibly fluoresces upon acidic pH. The probe is modified with N-hydroxysuccimide ester (NHS) which forms a covalent bond with primary amines just by mixing. It can be used for labeling proteins, antibodies and other molecules. For example, it can be applied for visualizing endocytosis of target protein on cell membrane by labeling antibodies that binds to the target protein. This probe binds to primary amines just by mixing. Thus it can be used to label antibodies and other proteins which have lysine residues. Its fluorescence intensity increases ~20-fold at an acidic pH. Spectral Properties Absorbance (max): 544 nm Emission (max): 565 nm (Orange) ，官网链接：https://www.sigmaaldrich.cn/product/mm/sct214 默克 科研、开发、生产。 作为生命科学行业的全球领先供应商，我们致力于为科研、生物技术开发和生产，以及制药药物疗法开发和生产提供各类解决方案和服务。

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