2-Amino-DL-tryptophan is a free amino acid belonging to the tryptophan family, featuring an indole-containing aromatic side chain and a backbone bearing both an amino group and a carboxyl group. The "DL" stereochemical designation indicates a racemic mixture of D- and L-forms at the alpha carbon, while the side chain retains the indole functionality that can participate in hydrophobic and π-interaction-driven behavior during peptide assembly. As an unprotected amino acid, it is used as a building block for preparing tryptophan-containing peptides and peptide analogues in solution-phase or solid-phase synthesis, and it can also serve in analytical method development or labeling workflows where indole-bearing amino acid substrates are required.
CAT No: CP24503
2-Amino-DL-tryptophan is an amino acid building block featuring the indole side chain characteristic of tryptophan, provided in a DL stereochemical form that contains both D- and L-tryptophan. As a free amino acid, it carries the primary amino group and a carboxylic acid suitable for standard organic coupling and analytical workflows, while the indole moiety enables downstream derivatization for peptide and materials chemistry. This reagent is commonly selected when stereochemical mixture is acceptable or when robust method development requires an unlabeled tryptophan reference material.
1. Peptide Building Block Use
2-Amino-DL-tryptophan is used as a tryptophan source for peptide synthesis workflows where a stereochemical mixture can be tolerated, such as preparing peptide fragments for method development, screening, or generating tryptophan-containing sequences for downstream derivatization. Researchers in custom peptide manufacturing and academic peptide chemistry often rely on free amino acid forms like this for solution-phase coupling strategies and for assembling tryptophan-containing intermediates that will later be purified and characterized. The indole side chain supports common tryptophan-compatible transformations and provides a chemically distinctive motif for confirming incorporation during analytical characterization.
2. Analytical Reference And Standards
2-Amino-DL-tryptophan is frequently used to prepare calibration materials and reference standards for amino acid analysis, including LC methods that quantify tryptophan-containing analytes in complex matrices. Because it is a free amino acid with the native indole functionality, it serves as a practical benchmark for retention time and response behavior in routine analytical method development and validation. Laboratories performing amino acid profiling, sample cleanup optimization, and instrument suitability checks often choose a DL form when the assay is designed to measure total tryptophan signal rather than stereospecific D/L resolution.
3. Chemical Derivatization For Indole Chemistry
2-Amino-DL-tryptophan supports derivatization strategies that target the indole side chain while retaining the amino acid backbone for further functionalization. In chemical biology and materials research, the indole motif is leveraged to generate tryptophan-derived intermediates used in labeling, immobilization chemistry, or the preparation of indole-containing building blocks for polymers and surface-bound materials. The presence of both the amino and carboxyl groups also enables straightforward conversion into activated derivatives for subsequent coupling steps, making this reagent useful when downstream chemistry requires a tryptophan scaffold rather than a protected amino acid.
4. Pharmaceutical Intermediate Development
2-Amino-DL-tryptophan is used as a tryptophan-derived starting material in the development of pharmaceutical intermediates and specialty chemical building blocks where an indole-containing amino acid scaffold is required. Process development groups and intermediate manufacturers commonly employ free amino acids as feedstocks for converting to carboxyl-activated or amino-functional intermediates that can be further elaborated into heteroaromatic-containing fragments. The indole side chain provides a chemically rich handle for diversification, while the DL stereochemical form can simplify procurement and supply for projects that do not require stereospecific control at the tryptophan center during early intermediate synthesis.
1. Peptides as Active Ingredients: A Challenge for Cosmeceutical Industry
2. Emu oil in combination with other active ingredients for treating skin imperfections
5. SERS spectrum of the peptide thymosin‐β4 obtained with Ag nanorod substrate
If you have any peptide synthesis requirement in mind, please do not hesitate to contact us at . We will endeavor to provide highly satisfying products and services.
Creative Peptides is a trusted CDMO partner specializing in high-quality peptide synthesis, conjugation, and manufacturing under strict cGMP compliance. With advanced technology platforms and a team of experienced scientists, we deliver tailored peptide solutions to support drug discovery, clinical development, and cosmetic innovation worldwide.
From custom peptide synthesis to complex peptide-drug conjugates, we provide flexible, end-to-end services designed to accelerate timelines and ensure regulatory excellence. Our commitment to quality, reliability, and innovation has made us a preferred partner across the pharmaceutical, biotechnology, and personal care industries.
Read More