Used in biochemical research, particularly in the study of protein structure and function. It serves as a derivative of cystine, aiding in the analysis of disulfide bonds in peptides and proteins. Applied in the development of drug delivery systems, where it helps stabilize and modify therapeutic compounds. Also utilized in the synthesis of modified amino acids for pharmaceutical applications. Its role in cell culture media supports the growth and maintenance of cells in vitro. Additionally, it finds use in the investigation of oxidative stress and related biological processes.