Intramolecular Fluorescence Quenching Effect byp-Nitrophenyl andp-Nitrophenoxy Groups

Effect of SodiumSulfateon the Hydrolysisof 17-Hydroxycorticosteroid- andp-Nitrophenyl-glucuronides with fl-GlucuronidasePreparationsfrom BovineLiver

Previous papers dealt with the discovery that hydrolysis of 17-hydroxycorticosteroid glucuronides in urine with fi-glucuronidase preparations from bovine liver is increased by adding sodium sulfate to the incubation medium. Here, we conclude that sodium sulfate not only increases the activity of bovine liver /9-glucuronidase on 17-hydroxycorticosteroid glucuronides and p-nitrophenyl glucuronide...

Avidin. 5. Quenching of fluorescence by dinitrophenyl groups.

Intramolecular quenching of tryptophan fluorescence by the peptide bond in cyclic hexapeptides.

Intramolecular quenching of tryptophan fluorescence by protein functional groups was studied in a series of rigid cyclic hexapeptides containing a single tryptophan. The solution structure of the canonical peptide c[D-PpYTFWF] (pY, phosphotyrosine) was determined in aqueous solution by 1D- and 2D-(1)H NMR techniques. The peptide backbone has a single predominant conformation. The tryptophan sid...

Modulation of intramolecular heterodimer-induced fluorescence quenching of tricarbocyanine dye for the development of fluorescent sensor.

Various approaches have been used to modulate the fluorescence changes of sensors in the presence of target analytes, including intramolecular interaction between fluorophores or between fluorophore and other molecular species, like resonance energy transfer (RET). Here, we focus on fluorescence quenching by intramolecular heterodimer complex formation, which can be modulated over a shorter dis...

Intramolecular electron transfer reactions in meso-(4-nitrophenyl)-substituted subporphyrins.

A2B-type meso-(4-nitrophenyl)-substituted subporphyrins have been synthesized and shown to undergo very fast photoinduced intramolecular charge separation (CS) and charge recombination (CR) between the subporphyrin core and the meso-4-nitrophenyl group in CH2Cl2 as probed by femtosecond time-resolved transient absorption spectroscopy. Red-shifted emissions were detected from charge-separated st...