The Fluorescent Reaction II

Reaction of Cystathionase with the Fluorescent Probe

The enzyme cystathionase from rat liver is inactivated by incubation with 5,5’-dithiobis(Z-nitrobenzoic acid) at pH 7.4. The reaction of four -SH groups per mole of enzyme brings about 95% loss of the homoserine deaminase activity. Kinetically, the reactive --SH groups can be classified into two classes. The substrate L-homoserine or the competitive inhibitor L-alanine has no effect on the rate...

Long-Wavelength, Reaction-Based, Fluorescent Sensors

Superstructures of fluorescent cyclodextrin via click-reaction

Mono-(6-azido-6-deoxy)-β-cyclodextrin (CD) was covalently attached to an alkyne-modified 5-methyl-2-(pyridin-2-yl)thiazol-4-ol yielding a fluorophore containing CD in a click-type reaction. Intermolecular complexes were formed by poly(host-guest)-interactions. The supramolecular structures were characterized by (1)H NMR-ROESY spectroscopy, dynamic light scattering, UV-vis spectroscopy, fluoresc...

Reaction of cystathionase with the fluorescent probe bis(dansyl)cystine.

The enzyme cystathionase from rat liver is inactivated by incubation with 5,5’-dithiobis(Z-nitrobenzoic acid) at pH 7.4. The reaction of four -SH groups per mole of enzyme brings about 95% loss of the homoserine deaminase activity. Kinetically, the reactive --SH groups can be classified into two classes. The substrate L-homoserine or the competitive inhibitor L-alanine has no effect on the rate...

Selective dendritic fluorescent sensors for Zn(II).

A series of dendritic 8-hydroxyquinoline (8-HQ) and 5-dialkyl(aryl)aminomethyl-8-HQ derivatives were synthesized and their fluoroionophoric properties toward representative alkali, alkaline earth, group IIIA and transition metal ions were investigated. Among the selected ions, Zn(II) enhanced the fluorescence of N-di-(methoxycarbonylethyl)aminoethyl-3-[4-(8-hydroxyquinolin-5-ylmethyl)piperazin-...