H-D-Trp-OH
Based on 1 publication(s) in Google Scholar
H-D-Trp-OH (D-Tryptophan) is the D-isomer of tryptophan, which is occasionally found in natural peptides, such as marine toxin peptides. H-D-Trp-OH can increase intestinal microbial diversity and counteract the inhibitory effect of allergic airway inflammation on intestinal microbial diversity.
For research use only. We do not sell to patients.
- Purity : 99.97%
- CAS No.: 153-94-6
- Formula: C11H12N2O2
- Molecular Weight:204.23
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Storage:
4°C, protect from light, stored under nitrogen
* In solvent : -80°C, 6 months; -20°C, 1 month (protect from light, stored under nitrogen)
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Biological Activity
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Chemical Information
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Solvent & Solubility
- Protocols
- Purity & Documentation
- References
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Help & FAQs
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HY-N0623
L-TryptophanEssential Amino Acid -
HY-W001171
3-Hydroxyanthranilic acidTryptophan Metabolite -
HY-Y0079
D-PhenylalanineBacterial Biofilm Formation Inhibibitor -
HY-B0225
Methyldopaα2-Adrenergic Receptors Agonist -
HY-N0122
5-HydroxytryptophanEndogenous Metabolite -
HY-100805
D-Glutamic acidEndogenous Metabolite -
HY-W012479R
H-D-Trp-OH (Standard) -
HY-N0832
L-HistidineEndogenous Metabolite -
HY-N0623R
L-Tryptophan (standard)Essential Amino Acid -
HY-76082
L-Pyroglutamic acidEndogenous Metabolite -
HY-76082R
L-Pyroglutamic acid (Standard)Standard of L-Pyroglutamic acid -
HY-N0832R
L-Histidine (Standard)Endogenous Metabolite
Publications Citing Use of MedChemExpress (MCE) H-D-Trp-OH
MoreAll Endogenous Metabolite Isoforms
More
Biological Activity
Description
IC50 & Target
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Microbial Metabolite |
Human Endogenous Metabolite |
In Vitro
H-D-Trp-OH (D-Tryptophan) in probiotics affects the gut microbiota and allergic airway disease. Allergic airway inflammation reduces gut microbial diversity, while D-Tryptophan increases gut microbial diversity[1].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only. Further protocols information, click here.
In Vivo
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Chemical Information
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CAS No. 153-94-6
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Appearance Solid
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Molecular Weight 204.23
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Formula C11H12N2O2
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Color White to off-white
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SMILES
O=C(O)[C@H](N)CC1=CNC2=CC=CC=C12
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Synonyms
D-Tryptophan
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Structure Classification
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Initial Source
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Shipping
Room temperature in continental US; may vary elsewhere.
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Storage
4°C, protect from light, stored under nitrogen
* In solvent : -80°C, 6 months; -20°C, 1 month (protect from light, stored under nitrogen)
Publications (1)
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Journal Impact Factor
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Most Recent
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Nature
2025 Jul;643(8070):192-200. PMID: 39695227
Solvent & Solubility
In Vitro:
1 M HCl : 50 mg/mL (244.82 mM; Need ultrasonic)
0.1 M HCl : 25 mg/mL (122.41 mM; ultrasonic and warming and heat to 60°C)
DMSO : 3.33 mg/mL (16.31 mM; ultrasonic and warming and heat to 60°C; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (protect from light, stored under nitrogen). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (protect from light, stored under nitrogen). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
In Vivo:
Select the appropriate dissolution method based on your experimental animal and administration route.
- For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
- To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for In Vivo experiments, it is recommended to prepare freshly and use it on the same day.
- The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.
Add each solvent one by one: 10% DMSO 40% PEG300 5% Tween-80 45% Saline
Solubility: ≥ 0.33 mg/mL (1.62 mM); Clear solution
This protocol yields a clear solution of ≥ 0.33 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (3.3 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.
Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
Add each solvent one by one: 10% DMSO 90% (20% SBE-β-CD in Saline)
Solubility: ≥ 0.33 mg/mL (1.62 mM); Clear solution
This protocol yields a clear solution of ≥ 0.33 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (3.3 mg/mL) to 900 μL 20% SBE-β-CD in Saline, and mix evenly.
Preparation of 20% SBE-β-CD in Saline (4°C, storage for one week): 2 g SBE-β-CD powder is dissolved in 10 mL Saline, completely dissolve until clear.
For the following dissolution methods, please prepare the working solution directly:
It is recommended to prepare fresh solutions and use them promptly within a short period of time.
The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.
Add each solvent one by one: Saline
Solubility: 5 mg/mL (24.48 mM); Clear solution; Need ultrasonic
In Vivo Dissolution Calculator
Please enter the basic information of animal experiments:
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Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Please enter your animal formula composition:
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%DMSO +
Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
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%+
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+%Tween-80 + +
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%Saline +
The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
Working solution concentration: 0.22 mg/mL
Method for preparing stock solution: mg drug dissolved in μL DMSO. Stock solution concentration: mg/mL. * In solvent : -80°C, 6 months; -20°C, 1 month (protect from light, stored under nitrogen)
1. Take μL DMSO stock solution;
2. Add μL .
μL , mix evenly;
3. Then add μL Tween 80, mix evenly;
4. Then add μL
Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
Protocols
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Ovalbumin-Induced Allergic Airway Inflammation
Ovalbumin-induced allergic airway inflammation is a mouse model in which systemic sensitization to ovalbumin, usually with aluminum hydroxide adjuvant, is followed by airway ovalbumin challenge to induce allergic airway inflammation, eosinophil recruitment, mucus production, serum antigen-specific IgE, Th2 cytokine responses, and airway hyperresponsiveness to methacholine. The model is used to study allergen-driven airway inflammation and asthma-like immune responses, but it does not reproduce every feature of human asthma. The main readouts are bronchoalveolar lavage fluid cellularity, lung histopathology, airway hyperresponsiveness, serum OVA-specific IgE, and cytokines such as IL-4, IL-5, and IL-13 in bronchoalveolar lavage fluid or lung samples. Eosinophilia and Th2 cytokines reflect allergic type 2 inflammation, while methacholine responsiveness provides a functional airway-reactivity endpoint.
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Research Protocol for Microbiome Analysis
Microbiome analysis characterizes microbial communities in biological or environmental samples by measuring community composition, diversity, taxonomic structure, functional potential, and associations with host or environmental phenotypes. 16S rRNA gene amplicon sequencing is commonly used for bacterial and archaeal taxonomic profiling, while shotgun metagenomics provides higher taxonomic resolution and direct functional information, including microbial genes, pathways, viruses, fungi, and antimicrobial-resistance genes when sequencing depth and host-DNA contamination are adequately controlled. Microbiome results are strongly affected by sample collection, storage, DNA extraction, contamination, sequencing method, reference database, and bioinformatic pipeline; therefore, standardized protocols, negative controls, mock communities, and transparent analysis workflows are required. Unresolved issues include low-biomass contamination, compositional-data bias, inconsistent species-level c
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Research Protocol for Inflammation-related Diseases
The NLRP3 inflammasome is a cytosolic innate immune signaling platform that integrates priming signals and danger-signal activation to promote caspase-1 activation, maturation of IL-1β and IL-18, and gasdermin D-mediated pyroptotic cell death. The core experimental logic is to determine whether inflammatory disease phenotypes are driven by increased NLRP3 expression, ASC-containing inflammasome assembly, caspase-1 cleavage, GSDMD cleavage, and extracellular release of IL-1β/IL-18 rather than by nonspecific cell injury alone. The pathway is strongly linked to inflammation-related disease phenotypes because monosodium urate crystals activate NALP3/NLRP3 inflammasome signaling in gout-like crystal inflammation, cholesterol crystals activate NLRP3 inflammasomes in atherogenesis models, and DSS-induced intestinal inflammation has been reported to involve NLRP3 inflammasome activity. However, experimental colitis studies also show context-dependent protective effects of NLRP3 inflammasome co
Purity & Documentation
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Data Sheet (277 KB)
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SDS (393 KB)
- English - EN (393 KB)
- Français - FR (393 KB)
- Deutsch - DE (393 KB)
- Norwegian - NO (393 KB)
- Español - ES (393 KB)
- Swedish - SV (393 KB)
- Italian - IT (393 KB)
- Korean - KR (393 KB)
- Portuguese - PT (393 KB)
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Handling Instructions (2659 KB)
References
Complete Stock Solution Preparation Table
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (protect from light, stored under nitrogen). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
| Optional Solvent | Concentration Solvent Mass | 1 mg | 5 mg | 10 mg | 25 mg |
|---|---|---|---|---|---|
| DMSO / 0.1 M HCl / 1 M HCl | 1 mM | 4.8964 mL | 24.4822 mL | 48.9644 mL | 122.4110 mL |
| 5 mM | 0.9793 mL | 4.8964 mL | 9.7929 mL | 24.4822 mL | |
| 10 mM | 0.4896 mL | 2.4482 mL | 4.8964 mL | 12.2411 mL | |
| 15 mM | 0.3264 mL | 1.6321 mL | 3.2643 mL | 8.1607 mL | |
| 0.1 M HCl / 1 M HCl | 20 mM | 0.2448 mL | 1.2241 mL | 2.4482 mL | 6.1206 mL |
| 25 mM | 0.1959 mL | 0.9793 mL | 1.9586 mL | 4.8964 mL | |
| 30 mM | 0.1632 mL | 0.8161 mL | 1.6321 mL | 4.0804 mL | |
| 40 mM | 0.1224 mL | 0.6121 mL | 1.2241 mL | 3.0603 mL | |
| 50 mM | 0.0979 mL | 0.4896 mL | 0.9793 mL | 2.4482 mL | |
| 60 mM | 0.0816 mL | 0.4080 mL | 0.8161 mL | 2.0402 mL | |
| 80 mM | 0.0612 mL | 0.3060 mL | 0.6121 mL | 1.5301 mL | |
| 100 mM | 0.0490 mL | 0.2448 mL | 0.4896 mL | 1.2241 mL |
H-D-Trp-OH Related Classifications
HY-W012479 Related Classifications
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