L-Tryptophylglycine is a dipeptide composed of the amino acids L-tryptophan and glycine. It is a white to off-white crystalline powder with the molecular formula C13H15N3O3. This compound is a specific sequence dipeptide, distinct from the more common dipeptide L-tryptophyl-L-glycine, and serves as a fundamental building block in peptide chemistry. Its primary application is in the field of life sciences and pharmaceutical research. L-Tryptophylglycine is used as a key intermediate or a protected derivative in the solid-phase or solution-phase synthesis of longer, biologically active peptides and peptidomimetics. The indole side chain of tryptophan is often crucial for biological activity, making this dipeptide a valuable synthon for constructing peptides targeting various receptors or enzymes. It is also utilized in biochemical studies to investigate peptide structure-activity relationships. As a specialized dipeptide, it is not considered a generic organic synthesis building block but is a defined biochemical reagent. It is typically handled under standard laboratory conditions for peptide work, requiring storage in a cool, dry place.