Glycyl-L-serine is a dipeptide composed of glycine and L-serine linked by a peptide bond. It is a white to off-white crystalline powder with a molecular formula of C5H10N2O4 and a molecular weight of 162.14 g/mol. This compound is a fundamental building block in peptide chemistry and biochemistry. Its primary applications are in life science research and pharmaceutical development. It serves as a key intermediate in the solid-phase or solution-phase synthesis of longer, biologically active peptides and proteins. As a dipeptide, it is also used in biochemical studies to investigate peptide structure, stability, and enzyme-substrate interactions. Furthermore, it finds utility in the preparation of specialized media for cell culture and microbiological studies. While its main use is in the life sciences domain, its well-defined structure and reactive amine and carboxyl termini also make it a valuable chiral synthon in organic synthesis for constructing more complex molecules, particularly those requiring specific amino acid motifs.