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Abstract

Uses of ethyl 5,11-dihydroindolo[3,2-b]carbazole-6-carboxylate as a fluorescent ligand probe, preferably in a binding assay for quantitative analysis in combination with a recombinant aryl hydrocarbon receptor (AhR) protein. A method for detection or quantitative analysis of suspected aryl hydrocarbon receptor (AhR) ligands in a sample, the method comprising the steps of: (a) providing a sample possibly containing at least one known or unknown AhR ligand; (b) mixing said sample with a composition comprising a recombinant AhR protein bound to ethyl 5,11-dihydroindolo[3,2-b]carbazole-6-carboxylate; and (c) determining the presence or the total amount of said at least one known or unknown AhR ligand in the sample by fluorescence spectroscopy. Use e.g. for screening of unknown compounds to determine their binding ability to AhR; for analyzing unknown chemical mixtures to assess the presence of ligands able to bind to AhR; for screening of Polycyclic Aromatic Hydrocarbon (PAHs) from water, food or sediment; for screening of PAHs or dioxin-like compounds in water, food or sediment; for testing for pollutant removal in water and waste water treatment plants; for testing for water reuse; for testing the presence of dioxin-like compounds in incinerator plants; or for testing of bodily fluids of humans or animals exposed to PAHs or dioxin-like compounds.

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First Claim