We report a fluorescent probe that is highly sensitive and selective for serum albumins. Signal transduction results from the disassembly of fluorescence-quenched aggregates upon binding to human serum albumin (HSA). The probe offers a rapid (≤2 s) fluorometric assay of HSA in phosphate-buffered saline, urine, or blood serum with a high signal-to-noise ratio. It is also useful as a wash-free prestaining reagent for detecting HSA on electrophoresis gels.
Keywords: aggregation; fluorescence; imaging agents; proteins; self-assembly.
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