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Что (кто) такое tryptophan reaction - определение
CLASS OF ENZYMES
Tryptophan 5-monooxygenase; Tryptophan-5-hydroxylase; EC 1.14.16.4; Tryptophan 5-hydroxylase; L-tryptophan,tetrahydrobiopterin:oxygen oxidoreductase (5-hydroxylating)
Tryptophan hydroxylase
Tryptophan hydroxylase (TPH) is an enzyme () involved in the synthesis of the neurotransmitter serotonin. Tyrosine hydroxylase, phenylalanine hydroxylase, and tryptophan hydroxylase together constitute the family of biopterin-dependent aromatic amino acid hydroxylases.
Tryptophan synthase
Tryptophan synthase or tryptophan synthetase is an enzyme () that catalyses the final two steps in the biosynthesis of tryptophan. It is commonly found in Eubacteria, Archaebacteria, Protista, Fungi, and Plantae.
Cascade reaction
![Heathcock]]'s synthesis of dihydroprotodaphniphylline features a highly efficient cascade involving two aldehyde/amine condensations, a Prins-like cyclization, and a 1,5-hydride transfer to afford a pentacyclic structure from an acyclic starting material.](https://commons.wikimedia.org/wiki/Special:FilePath/Dihydroprotodaphniphylline synthesis.png?width=200 "Heathcock]]'s synthesis of dihydroprotodaphniphylline features a highly efficient cascade involving two aldehyde/amine condensations, a Prins-like cyclization, and a 1,5-hydride transfer to afford a pentacyclic structure from an acyclic starting material.")
!['''Scheme 11.''' Pericyclic sequence for the synthesis of [2,2]paracyclophanes](https://commons.wikimedia.org/wiki/Special:FilePath/Scheme 11 - peri - pcyclophane.svg?width=200 "'''Scheme 11.''' Pericyclic sequence for the synthesis of [2,2]paracyclophanes")
!['''Scheme 14.''' Gold-catalyzed
formal intramolecular [4+2] cycloaddition of 1,6-enynes](https://commons.wikimedia.org/wiki/Special:FilePath/Scheme 14 - metal - gold enyne.svg?width=200 "'''Scheme 14.''' Gold-catalyzed
formal intramolecular [4+2] cycloaddition of 1,6-enynes")
!['''Scheme 15.''' Proposed cascade process in the formal intramolecular [4+2] cycloaddition of 1,6-enynes](https://commons.wikimedia.org/wiki/Special:FilePath/Scheme 15 - metal - gold enyne mech.svg?width=200 "'''Scheme 15.''' Proposed cascade process in the formal intramolecular [4+2] cycloaddition of 1,6-enynes")
CHEMICAL PROCESS
Tandem reaction; Domino reaction; Negishi zipper reaction; Negishi-Zipper reaction
A cascade reaction, also known as a domino reaction or tandem reaction, is a chemical process that comprises at least two consecutive reactions such that each subsequent reaction occurs only in virtue of the chemical functionality formed in the previous step.Tietze, L.
Википедия
Tryptophan hydroxylase
Tryptophan hydroxylase (TPH) is an enzyme (EC 1.14.16.4) involved in the synthesis of the neurotransmitter serotonin. Tyrosine hydroxylase, phenylalanine hydroxylase, and tryptophan hydroxylase together constitute the family of biopterin-dependent aromatic amino acid hydroxylases. TPH catalyzes the following chemical reaction
- L-tryptophan + tetrahydrobiopterin + O2 5-Hydroxytryptophan + dihydrobiopterin + H2O
It employs one additional cofactor, iron.
