Results 211 to 220 of about 226,401 (254)
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Biochimica et Biophysica Acta, 1960
Abstract Tryptophan possesses two sets of emissions, each one of which has one short-lived emission and one long-lived emission. The excitation by π-π absorption at 280 mμ gives u.v. fluorescence and blue phosphorescence under certain conditions, e.g. frozen in an aqueous solution containing glucose or methanol.
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Abstract Tryptophan possesses two sets of emissions, each one of which has one short-lived emission and one long-lived emission. The excitation by π-π absorption at 280 mμ gives u.v. fluorescence and blue phosphorescence under certain conditions, e.g. frozen in an aqueous solution containing glucose or methanol.
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Activation of the Ah Receptor by Tryptophan and Tryptophan Metabolites
Biochemistry, 1998The aryl hydrocarbon receptor (AhR) is a ligand-dependent transcription factor that mediates many of the biological and toxicological actions of a variety of hydrophobic natural and synthetic chemicals, including the environmental contaminant 2,3,7, 8-tetrachlorodibenzo-p-dioxin (TCDD, dioxin). A variety of indole-containing chemicals, such as indole-3-
Heath-Pagliuso, S. +6 more
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Detection of Tryptophan to Tryptophan Energy Transfer in Proteins
The Protein Journal, 2004Förster resonance energy transfer (FRET) studies usually involve observation of intensity or lifetime changes in the donor or acceptor molecule and usually these donor and acceptor molecules differ (heterotransfer). The use of polarization to monitor FRET is far less common, although it was one of the first methods utilized. In 1960, Weber demonstrated
Pierre D J, Moens +2 more
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Tryptophan uptake and tryptophan oxygenase activity in mice
Biochemical and Biophysical Research Communications, 1970Abstract Groups of mice were injected intraperitoneally with L-tryptophan, 1 mg/gm body weight, and maintained at room temperature (22° C) or exposed to acute heat stress (36° C). In the heat-stressed animals, plasma tryptophan levels were lower at each time interval studied when compared with room temperature controls; however, both hepatic ...
R P, Francesconi, M, Mager
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Specific Enzymatic Chlorination of Tryptophan and Tryptophan Derivatives
1999In the search for an alternative to chemical halogenation reactions using the free halogens, a novel type of halogenating enzymes was detected. In contrast to haloperoxidases, these NADH-dependent halogenases are specific. Tryptophan halogenase which catalyses the regioselective chlorination of tryptophan to 7-chlorotryptophan can also chlorinate ...
K H, van Pée, M, Hölzer
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Tryptophan Metabolism in Rabbits
2003Enzyme activities involved in tryptophan metabolism along the kynurenine pathway were studied in male New Zealand white rabbits. Activities are expressed both as specific activity and per g of fresh tissue. Liver tryptophan 2,3-dioxygenase activity (TDO), when assayed in either the absence (holoenzyme) or presence of added haematin (apoenzyme), did not
ALLEGRI, GRAZIELLA +4 more
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Tryptophan regulation of brain tryptophan hydroxylase
Brain Research, 1976Diez, J A, Sze, P Y, Ginsburg, B E
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Acta vitaminologica et enzymologica, 1978
The in vivo assay of tryptophan pyrrolase gives best results when [ring-2-14C] tryptophan is used and rates of labelled CO2 production are measured at short times after the labelled tryptophan injection. Using this technique in conjunction with in vitro measurements, we find that both tryptophan pyrrolase activity and the liver tryptophan concentration
S N, Young, T L, Sourkes
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The in vivo assay of tryptophan pyrrolase gives best results when [ring-2-14C] tryptophan is used and rates of labelled CO2 production are measured at short times after the labelled tryptophan injection. Using this technique in conjunction with in vitro measurements, we find that both tryptophan pyrrolase activity and the liver tryptophan concentration
S N, Young, T L, Sourkes
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