Tryptophan (symbol Trp or W) is an α-amino acid that is used in the biosynthesis of proteins. Tryptophan contains an α-amino group, an α-carboxylic acid...

Tryptophan synthase or tryptophan synthetase is an enzyme (EC 4.2.1.20) that catalyzes the final two steps in the biosynthesis of tryptophan. It is commonly...

ingestion of the dietary supplement L-tryptophan. The risk of developing EMS increases with larger doses of tryptophan and increasing age. Some research suggests...

In addition, tryptophan is a relatively rare amino acid; many proteins contain only one or a few tryptophan residues. Therefore, tryptophan fluorescence...

Tryptophan hydroxylase (TPH) is an enzyme (EC 1.14.16.4) involved in the synthesis of the monoamine neurotransmitter serotonin. Tyrosine hydroxylase, phenylalanine...

bacteria. The operon is regulated so that, when tryptophan is present in the environment, the genes for tryptophan synthesis are repressed. The trp operon contains...

5-HTP is produced from the amino acid tryptophan through the action of the enzyme tryptophan hydroxylase. Tryptophan hydroxylase is one of the biopterin-dependent...

In enzymology, tryptophan 2,3-dioxygenase (EC 1.13.11.11) is a heme enzyme that catalyzes the oxidation of L-tryptophan (L-Trp) to N-formyl-L-kynurenine...

L-Tryptophan decarboxylase (EC 4.1.1.105) is an enzyme distinguished by the substrate L-tryptophan. This enzyme catalyzes the reaction of L-tryptophan to...

Tryptophan repressor (or trp repressor) is a transcription factor involved in controlling amino acid metabolism. It has been best studied in Escherichia...

Tryptophan hydroxylase 2 (TPH2) is an isozyme of tryptophan hydroxylase found in vertebrates. In humans, TPH2 is primarily expressed in the serotonergic...

In enzymology, a tryptophan transaminase (EC 2.6.1.27) is an enzyme that catalyzes the chemical reaction L-tryptophan + 2-oxoglutarate ⇌ {\displaystyle...

but not uptake of tryptophan. This lowers the ratio of these branched-chain amino acids in the bloodstream relative to tryptophan (an aromatic amino...

Tryptophan pyrrolase may refer to: Tryptophan 2,3-dioxygenase, an enzyme Indoleamine 2,3-dioxygenase, an enzyme This set index page lists enzyme articles...

enzymology, a tryptophan dimethylallyltransferase (EC 2.5.1.34) is an enzyme that catalyzes the chemical reaction dimethylallyl diphosphate + L-tryptophan ⇌ {\displaystyle...

dinucleotide (NAD+). Metabolites involved in the kynurenine pathway include tryptophan, kynurenine, kynurenic acid, xanthurenic acid, quinolinic acid, and 3-hydroxykynurenine...

Tryptophan hydroxylase 1 (TPH1) is an isoenzyme of tryptophan hydroxylase which in humans is encoded by the TPH1 gene. TPH1 was first discovered to support...

In enzymology, a tryptophan dehydrogenase (EC 1.4.1.19) is an enzyme that catalyzes the chemical reaction L-tryptophan + NAD(P)+ + H2O ⇌ {\displaystyle...

manufactured tryptophan so that the bacteria would be more efficient. At the same time, they also changed the technique used to purify the tryptophan.: 327–328 ...

Tryptamine is an indolamine metabolite of the essential amino acid, tryptophan. The chemical structure is defined by an indole—a fused benzene and pyrrole...

or placenta. In humans is encoded by the IDO1 gene. IDO is involved in tryptophan metabolism. It is one of three enzymes that catalyze the first and rate-limiting...

Indoles are widely distributed in nature, most notably as amino acid tryptophan and neurotransmitter serotonin. Indole is a solid at room temperature...

enzymology, a D-tryptophan N-malonyltransferase (EC 2.3.1.112) is an enzyme that catalyzes the chemical reaction malonyl-CoA + D-tryptophan ⇌ {\displaystyle...

Acute tryptophan depletion (ATD) is a technique used extensively to study the effect of low serotonin in the brain. This experimental approach reduces...

enzymology, a D-tryptophan N-acetyltransferase (EC 2.3.1.34) is an enzyme that catalyzes the chemical reaction acetyl-CoA + D-tryptophan ⇌ {\displaystyle...

L-tryptophan—pyruvate aminotransferase (EC 2.6.1.99, TAA1 (gene), vt2 (gene)) is an enzyme with systematic name L-tryptophan:pyruvate aminotransferase...

Tryptophan synthase (indole-salvaging) (EC 4.2.1.122, tryptophan synthase beta2) is an enzyme with systematic name L-serine hydro-lyase (adding indole...

Tryptophan N-monooxygenase (EC 1.14.13.125, tryptophan N-hydroxylase, CYP79B1, CYP79B2, CYP79B3) is an enzyme with systematic name L-tryptophan,NADPH:oxygen...

In enzymology, a tryptophan alpha,beta-oxidase (EC 1.3.3.10) is an enzyme that catalyzes the chemical reaction L-tryptophan + O2 ⇌ {\displaystyle \rightleftharpoons...

Tryptophan 7-halogenase (EC 1.14.19.9, PrnA, RebH) is an enzyme with systematic name L-tryptophan:FADH2 oxidoreductase (7-halogenating). This enzyme catalyses...