2-[(2-aminoacetyl)amino]acetic acid, commonly known as glycylglycine, is the simplest dipeptide, consisting of two glycine units linked by a peptide bond. This organic compound typically appears as a white crystalline powder and is highly valued for its solubility in water and its zwitterionic character. As a fundamental building block in peptide chemistry, it serves as a critical model system for studying the physical and chemical properties of proteins and more complex amino acid chains.
In laboratory and industrial settings, glycylglycine is primarily recognized for its utility as a biological buffer, particularly effective in the physiological pH range. Its chemical stability and low toxicity make it a reliable component in various biochemical assays and enzymatic studies. Beyond its buffering capacity, it acts as a versatile intermediate in the synthesis of specialized pharmaceuticals and fine chemicals, where precise molecular architecture is required.