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- W2101802013 abstract "Stacking interactions between organic fluorophores can cause formation of non-fluorescent H-dimers. Dimer formation and dissociation of two fluorophores site-specifically incorporated in a biomolecule result in fluorescence intermittency that can report on conformational dynamics. We characterize intramolecular dimerization of two oxazine fluorophores MR121 attached to an unstructured polypeptide. Formation of stable non-fluorescent complexes with nano- to microsecond lifetimes is a prerequisite for analysing the intermittent fluorescence emission by fluorescence correlation spectroscopy and extracting relaxation time constants on nano- to millisecond time scales. Destabilization of the generally very stable homodimers by chemical denaturation reduces the lifetime of H-dimers. We demonstrate that H-dimer formation of an oxazine fluorophore reports on end-to-end contact rates in unstructured glycine–serine polypeptides under denaturing conditions." @default.
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- W2101802013 date "2011-01-01" @default.
- W2101802013 modified "2023-10-14" @default.
- W2101802013 title "Dimer formation of organic fluorophores reports on biomolecular dynamics under denaturing conditions" @default.
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- W2101802013 doi "https://doi.org/10.1039/c1cp21111k" @default.
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