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Showing 1 to 12 of 12 for “"Hydroxytryptophan"”.
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N-hydroxytryptophan in synthetic approaches to indole alkaloids : a lustrum of n-hydroxytrypto-fun
Contains fulltext : 30078_nhydinsya.pdf (Publisher’s version ) (Open Access)
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Effects of Alterations in Monoamine Levels on Conditioned Taste Aversions in the Rat.
… pretreatment with the serotonin precursor, 5-hydroxytryptophan, will attenuate a taste aversion. However, conclusions based on studies using 5-hydroxytryptophan may be of limited value since exogenous 5-hydroxytryptophan may be converted into serotonin in catecholaminergic neurons as well as …
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Effects of the Administration of 5-Hydroxydl-Tryptophan and 3,4-Dihydroxyphenylalanine on the Acquisition of a Conditioned Avoidance Response
… of performance while the administration of 5-hydroxytryptophan (5-HTP) results in an impairment of performance and reported enhancement of acquisition. The purpose of the present study is to compare the effects of 5-HTP and L-Dopa on the acquisition of a single behavioral task. Each animal …
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Tryptophan-Abkömmlinge in wirbellosen Meerestieren : Isolierung, Struktur und Funktion
… hin untersucht. Als Hauptmetabolit konnte 5-Hydroxytryptophan (186) isoliert werden, das ein Redoxpotential mit antioxidativen Möglich-keiten besitzt. Mehrere Aufsammlungen wurden mittels HPLC und NMR-Spektroskopie quantifiziert. Der durchschnittliche Gehalt von (0.45 ± 0.23) bestätigte die …
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Metalloprotein Engineering Using Heme Protein Scaffolds to Investigate the Oxidation of Endogenous Aromatic Amino Acids and Exogenous Substrates
… The Trp was stoichiometrically hydroxylated to 6-hydroxytryptophan. Factors required to engineer metal binding sites were studied by the redesign of an engineered manganese binding site in CcP. Kinetic parameters and crystal structures of the protein demonstrate the importance of the metal and …
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The Effect of Gonadal Steroids and Altered Tryptophan Metabolism on behaviour
… oxidase inhibitor and either l-tryptophan or 5-hydroxytryptophan, was thought to be due to increased brain tryptemine levels, rather than the associated increase in brain 5-hydroxytryptamine levels,
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ΑΠΟΜΟΝΩΣΗ ΚΑΙ ΚΑΘΑΡΙΣΜΟΣ ΤΟΥ ΕΝΖΥΜΟΥ L-DOPA ΑΠΟΚΑΡΒΟΞΥΛΑΣΗ ΑΠΟ ΤΙΣ ΛΕΥΚΕΣ ΝΥΜΦΕΣ ΤΟΥ ΕΝΤΟΜΟΥ CERATITIS CAPITATA ΚΑΙ ΑΠΟ ΑΝΘΡΩΠΙΝΟ ΝΕΦΡΙΚΟ ΙΣΤΟ. ΣΥΓΚΡ...
… TOWARDS L-DOPA AND AN AFFINITY FOR 5- HYDROXYTRYPTOPHAN. DOPA DECARBOXYLASE OF WHITE PREPUPAE SHOWS ABSOLUTE SPECIFICITY TOWARDS L-DOPA.
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Development of Epipolythiodiketopiperazine syntheses and the total synthesis of diketopiperazine alkaloids
… a new and scalable method for erythro-[beta]- hydroxytryptophan amino acid synthesis and a new mercaptan reagent for the epipolythiodiketopiperazine (ETP) synthesis that can be unraveled under very mild conditions. The development of this new reagent was accomplished after exploring the acid …
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Analysis of Clinically Important Compounds Using Electrophoretic Separation Techniques Coupled to Time-of-Flight Mass Spectrometry
… indolamines (serotonin, tryptophan, and 5-hydroxytryptophan), and angiotensin peptides. While electrophoretic separation techniques provided high separation efficiency, mass spectrometric detection afforded specificity unsurpassed by other types of detectors.</p> <p>Both catecholamines and …
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Studies in the handling and absorption of biopterin derivatives in man
… of tyrosine to dopa and tryptophan to 5—hydroxytryptophan. Serum Crithidia factor levels in phenylketonuria were elevated as a result of hyperphenylalaninaemia, This raised level could arise either from increased synthesis or altered tissue/body fluid partition. In kidney disease, where …
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Total synthesis of cyclotryptamine and diketopiperazine alkaloids
… a new and scalable method for erythro-[beta]-hydroxytryptophan amino acid synthesis, an intramolecular Friedel-Crafts reaction of a silyl-tethered indole, and a new mercaptan reagent for epipolythiodiketopiperazine (ETP) synthesis that can be unravelled under very mild conditions. In …
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Possible Influences of Circadian Melatonin on the Function of Neurosecretory Neurons and Serotonin-Modulated Behavior on Crayfish.
… (5-HT) und N-acetylserotonin (NAS), welche aus 5-Hydroxytryptophan synthetisiert werden. Serotonin spielt eine wichtige Rolle in verschiedene Funktionen bei Vertebraten und Wirbellosen. Trotzdem, sind die Kenntnisse über Invertebraten N-acetylserotonin relative begrenzt, und auch für Melatonin …