Carboxypeptidase inhibitor from potato tuber is primarily utilized in biochemical research to study the function and mechanism of carboxypeptidase enzymes. It serves as a valuable tool in enzymatic assays, helping to elucidate the role of these enzymes in various biological processes, including protein digestion and peptide processing. Additionally, it is employed in the development of enzyme inhibitors for therapeutic applications, particularly in conditions where carboxypeptidase activity needs to be modulated, such as in certain cancers or inflammatory diseases. Its use in structural biology also aids in understanding enzyme-inhibitor interactions at the molecular level, contributing to drug design and discovery.