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H9772

Sigma-Aldrich

5-Hydroxy-L-tryptophan

≥98% (TLC), suitable for HPLC

Synonym(s):

L-2-Amino-3-(5-hydroxyindolyl)propionic acid, L-5-HTP

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About This Item

Empirical Formula (Hill Notation):
C11H12N2O3
CAS Number:
Molecular Weight:
220.22
EC Number:
MDL number:
UNSPSC Code:
12352209
eCl@ss:
32160406
PubChem Substance ID:
NACRES:
NA.77

product name

5-Hydroxy-L-tryptophan, powder

Assay

≥98% (TLC)

form

powder

technique(s)

HPLC: suitable

color

white to faint beige

storage temp.

2-8°C

SMILES string

N[C@@H](Cc1c[nH]c2ccc(O)cc12)C(O)=O

InChI

1S/C11H12N2O3/c12-9(11(15)16)3-6-5-13-10-2-1-7(14)4-8(6)10/h1-2,4-5,9,13-14H,3,12H2,(H,15,16)/t9-/m0/s1

InChI key

LDCYZAJDBXYCGN-VIFPVBQESA-N

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General description

5-Hydroxy-L-tryptophan (5-HTP) is naturally found in Griffonia simplicifolia.

Application

5-Hydroxy-L-tryptophan has been used:
  • to inject experimental mice for serotonin detection
  • as a precursor of 5-hydroxytryptamine and injected in pregnant mice and neonatal rats for vital neutral red staining of lung slices
  • as a standard in citrate-acetate buffer for its use in high performance liquid chromatography (HPLC) analysis

Biochem/physiol Actions

Hydroxylation of L-tryptophan occurs in the brain during serotonin synthesis. This is a step that controls the production of serotonin and also yields 5-hydroxy-l-tryptophan (5-HTP) as a metabolite. Thus, consumption 5-HTP, increases the serotonin level, which might result in depression, lack of sleep and severe headache.
Immediate precursor of serotonin; L-aromatic amino acid decarboxylase substrate.

Caution

Light sensitive

Pictograms

Skull and crossbones

Signal Word

Danger

Hazard Statements

Hazard Classifications

Acute Tox. 3 Oral

Storage Class Code

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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M G Marrero et al.
Scientific reports, 10(1), 9712-9712 (2020-06-18)
Dairy calves are born with a naïve immune system, making the pre-weaning phase a critical window for immune development. In the U.S., 40-60% of dairy farms feed milk replacer to pre-weaned calves, which are devoid of bioactive factors with immunological
Enhanced synthesis of 5-hydroxy-l-tryptophan through tetrahydropterin regeneration
Hara R and Kino K
AMB Express, 3(1), 70-70 (2013)
Andrew N Bubak et al.
PloS one, 14(1), e0203980-e0203980 (2019-01-30)
Despite the conserved function of aggression across taxa in obtaining critical resources such as food and mates, serotonin's (5-HT) modulatory role on aggressive behavior appears to be largely inhibitory for vertebrates but stimulatory for invertebrates. However, critical gaps exist in
Endocrine taste cells
Kokrashvili Z, et al.
The British Journal of Nutrition, 111(S1), S23-S29 (2014)
I Pintelon et al.
Cell and tissue research, 321(1), 21-33 (2005-05-20)
Pulmonary neuroepithelial bodies (NEBs) are extensively innervated organoid groups of neuroendocrine cells that lie in the epithelium of intrapulmonary airways. Our present understanding of the morphology of NEBs is comprehensive, but direct physiological studies have so far been challenging because

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