Ac-D-Arg-OH

Ac-D-Arg-OH is an N-acetylated D-arginine building block supplied as a free carboxylic acid, featuring the guanidinium-containing arginine side chain in the D configuration. The N-acetyl group provides a protected, non-basic amide terminus that is frequently used to control peptide N-terminus chemistry and improve handling during synthesis and analytical work. As a stereochemically defined arginine derivative, it is commonly selected when D-arginine incorporation, defined charge presentation, or N-acetyl capping is required for downstream peptide and materials workflows.

1. D-Arginine Peptide Building

Ac-D-Arg-OH is used as a defined arginine-containing residue for custom peptide synthesis where D-configuration at the α-carbon is required to probe stereochemical effects, proteolysis resistance trends, or to build D-amino acid-enriched sequences. The N-acetylation state helps establish the peptide's N-terminal chemistry from the outset, supporting workflows that generate short D-amino acid segments, cyclic or constrained constructs, and peptide fragments for subsequent coupling strategies. Researchers in peptide chemistry and chemical biology rely on this type of residue to ensure consistent guanidinium placement and charge behavior in the assembled sequence.

2. Protease Resistance Studies

Ac-D-Arg-OH is commonly employed in chemical biology and peptide research to generate D-arginine-containing peptide substrates and analogs used in protease susceptibility experiments. By using D-arginine rather than the L stereoisomer, investigators can systematically evaluate how stereochemistry influences enzymatic processing and cleavage patterns while keeping the arginine side-chain functionality constant. The N-acetyl cap further standardizes the peptide's N-terminus, which is often a key variable when comparing cleavage outcomes across peptide series.

3. Analytical Reference and LC-MS Workflows

Ac-D-Arg-OH supports analytical method development and reference standard preparation for studies that require stereochemically defined arginine derivatives, including LC-MS characterization of peptide mixtures and monitoring of synthesis-derived impurities or intermediates. The combination of a fixed D stereocenter and an N-acetylated amino terminus provides a distinct chemical signature that can be used to validate retention behavior and mass spectral assignment for arginine-containing fragments. Analytical chemists and peptide manufacturing development teams use such standards to improve identification confidence when working with complex, stereochemically mixed samples.

4. Pharmaceutical Intermediate Development

Ac-D-Arg-OH is used as a stereochemically defined amino acid derivative in downstream intermediate preparation for peptidomimetic and specialty building-block programs. Development groups in medicinal chemistry and process chemistry value the N-acetylated form because it can serve as a controlled starting material for generating arginine-containing intermediates with the desired terminal functionality for later assembly steps. The guanidinium side chain enables incorporation into charged pharmacophore-like motifs, while the D configuration supports programs that explore stereochemical modulation of structure-property relationships.

1. Exosomes-mediated Transfer of miR-125a/b in Cell-to-cell Communication: A Novel Mechanism of Genetic Exchange in the Intestinal Microenvironment

2. Immune-awakening Saccharomyces-inspired nanocarrier for oral target delivery to lymph and tumors

3. Quantitative Analysis of Ligands Effects on Bioefficacy of Nanoemulsion encapsulating Depigmenting Active

4. Implications of ligand-receptor binding kinetics on GLP-1R signalling

5. P-selectin and Complement’s Role in a Neonatal Model of Germinal Matrix Hemorrhage-Induced Secondary Injury