A general assay for monitoring catalysis by fluorescence in real time has been developed by use of an antibody sensor. The sensor consists of a product-specific antibody tightly bound to a product analogue covalently labeled with the fluorescent tag acridone. Acridone fluorescence is quenched in the bound state. The reaction is monitored by following the fluorescence increase caused by displacement of the acridone-labeled product from the antibody combining site by the released product. Fluorescence detection of enzymatic hydrolysis of a beta-galactoside and butyrate by beta-galactosidase and esterase, respectively, are demonstrated. The assay operates by modulation of fluorescence intensity at 445 nm, a signal compatible with currently available instruments measuring in 96-well or 384-well plastic microtiter plates. The method is potentially general and only limited by binding selectivities of the product versus the substrate that can be encountered in antibodies.
<i>N</i>-Dimethylaminopropylation in a Solid-Liquid Two Phase System: Synthesis of Chlorpromazine, its Analogs, and Related Compounds
作者:S. J. Schmolka、Hans Zimmer
DOI:10.1055/s-1984-30719
日期:——
Highly photoresistant chemosensors using acridone as fluorescent label
作者:Nicolaus Bahr、Emily Tierney、Jean-Louis Reymond
DOI:10.1016/s0040-4039(97)00137-8
日期:1997.3
Highly photoresistant and selective chemosensors have been prepared using acridone as fluorescent label in combination with monoclonal antibodies. (C) 1997 Elsevier Science Ltd.