TCI A0122 N-Acetyl-L-tryptophan Ethyl Ester is a derivative of the amino acid L-tryptophan in which the amino group is acetylated and the carboxyl group is esterified with ethanol. Because both ends are modified, the molecule resembles a single tryptophan residue inside a peptide chain, yet it carries no free amino or carboxyl terminus. In the laboratory it is grouped under peptide chemistry and chemical biology, and it is commonly used as a model compound, a test substrate, or a reference material in studies that involve tryptophan residues.
The main strength of this compound is that the indole group of tryptophan remains intact. Indole is known for its characteristic spectroscopic behavior, so tryptophan derivatives are often used in ultraviolet absorption and fluorescence studies. The ethyl ester at the carboxyl end also allows the molecule to act as a substrate for enzymes that hydrolyze esters, while the acetyl group protects the nitrogen from unwanted reactions. Together these features make it a practical choice for researchers who need a simple, well-defined model of a tryptophan residue.
For biochemistry, natural products chemistry, and pharmaceutical laboratories in Indonesia, this reagent supports work that would otherwise require a full peptide or protein. Teams can use it to set up and compare assay conditions, train staff on peptide-related techniques, or run preliminary investigations before moving to more complex and costly sequences. As a TCI product supplied through AMI Scientific, it fits routine research and teaching workflows where a defined tryptophan model is needed.
TCI brochures (PDF)
- Amino Acids and Peptide Synthesis Reagents 2025-08-14 · p. 11
Related TCI products
- Tryptophan residue model studies: the acetylated amine and esterified carboxyl mimic a residue within a peptide chain, so researchers can study tryptophan behavior without interference from free terminal groups.
- Enzyme substrate testing: the ethyl ester bond can be hydrolyzed by ester-cleaving enzymes, which makes this compound a convenient, defined substrate for evaluating enzyme activity and comparing reaction conditions.
- Ultraviolet absorption and fluorescence studies: the intact indole group gives the characteristic spectroscopic properties of tryptophan, making the compound a useful reference when calibrating or interpreting optical measurements.
- Peptide chemistry reference material: as a protected tryptophan derivative, it serves as a comparison standard when analyzing or characterizing tryptophan-containing compounds in synthetic and analytical work.
- Chemical biology method development: its simple, well-defined structure lets laboratories test and refine analytical or reaction methods involving tryptophan before applying them to more complex and valuable peptide samples.
| Brand | TCI |
|---|---|
| CAS number | 2382-80-1 |
| Molecular formula | — |
| Purity | — |
| Category | Chemistry > Chemical Biology > Peptide Chemistry |
| Pack sizes | please refer to the product page or contact AMI Scientific for available sizes |
| Physical form | refer to the supplier label and safety data sheet for the exact form and recommended storage conditions |
| Storage | — |
- Product code: A0122
Store the product in its original, tightly closed container, in a cool, dry place away from direct sunlight, heat sources, and incompatible materials. Always follow the storage conditions printed on the supplier label and in the safety data sheet. Because the compound contains an ester bond and an indole ring, keep it protected from moisture and strong light to help preserve its quality. Handle it in a well-ventilated area or fume hood, and wear standard personal protective equipment, including a laboratory coat, gloves, and safety glasses. Avoid inhaling dust and avoid contact with skin and eyes. Label any secondary containers clearly, and dispose of waste according to local regulations and institutional procedures.
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