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The monitoring of K+ is very important and emergency because of their unique relationship in various disease diagnosis and treatment. G-quadruplex analogue is a classical recognition unit for K+ detection and has been widely applied in K+ relevant research. Common fluorescent dyes were employed for design of G-quadruplex structure-based K+ probes which suffered from the aggregation-caused quenching...
A highly sensitive fluorimetric assay has been developed for the evaluation of glutathione reductase (GR) activity and the screening of its inhibitors by using carbon quantum dots (CQDs) as the signal reporter. The detection mechanism is based on the following facts: (1) the fluorescence of CQDs can be quenched by Hg(II) through the strong CQDs-Hg(II) coordination; (2) GR can catalyze the reduction...
Free polyethylene glycol (PEG) is a byproduct produced during the process of pegylation and should be removed for the purification of pegylated proteins. In this paper, it was used to develop a new method for obtaining the modification extent of pegylated proteins. This method included two steps of operation. Firstly, the free PEG was separated from crude reaction mixture of pegylated proteins by...
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