Glycyl-L-tyrosine dihydrate is a dipeptide composed of glycine and L-tyrosine linked by a peptide bond. It is a white to off-white crystalline powder with the molecular formula C11H14N2O4·2H2O and a molecular weight of 282.26 g/mol. This compound is a derivative of the amino acid tyrosine. This dipeptide is primarily used as a biochemical reagent in life science research. It serves as a substrate for studying the activity and specificity of various proteolytic enzymes, such as aminopeptidases and carboxypeptidases. It is also utilized in cell culture media and as a component in nutritional and metabolic studies. Furthermore, it finds application as a building block or intermediate in the synthesis of more complex peptides and peptide-based pharmaceuticals. Glycyl-L-tyrosine is soluble in water and dilute acids/bases. It should be stored in a cool, dry place, protected from light. Standard laboratory safety precautions should be observed when handling this material.