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- W1574398420 abstract "The commercially available dye, NanoOrange, has been investigated as a potential tool for clinical diagnostics due to its low cost, ease of use, and ability to detect nanomolar concentrations of protein. Virtually non-fluorescent in dilute aqueous solutions, NanoOrange fluorescence is enhanced by at least an order of magnitude upon non-covalent interaction with proteins. These features, coupled with the requirement for high throughput assays in the clinical laboratory has prompted the development of two orthogonal NanoOrange approaches. Human serum albumin (HSA) was used as a model protein for the development of both 96-well microplate and capillary electrophoresis laser-induced fluorescence (CE-LIF) assay formats. Dye performance in five commonly used buffers of various concentrations and pH indicated considerable flexibility in assay buffer selection, with optimal performance at pH 9.0. A salt concentration study indicated that increasing NaCl concentration generally decreases fluorescence emission and can be minimized by pre-diluting biological samples to a final salt concentration of 20-80 mM. Titration of protein with NanoOrange resulted in optimal HSA-NanoOrange complex formation utilizing 1 x and 2 x NanoOrange in the 96-well microplate and CE-LIF approaches, respectively. A NanoOrange binding model based on rapid signal enhancement and zero order fluorescence emission kinetics is proposed. The utilization of NanoOrange in CE-LIF based human serum analysis results in a signal-to-background ratio improvement of up to two orders of magnitude." @default.
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- W1574398420 date "2001-04-01" @default.
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- W1574398420 title "Utilization of the non-covalent fluorescent dye, NanoOrange, as a potential clinical diagnostic tool" @default.
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- W1574398420 doi "https://doi.org/10.1016/s0378-4347(00)00627-7" @default.
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