ACTH 22-39, a fragment of the adrenocorticotropic hormone, is primarily used in research settings to study the structure and function of the ACTH peptide. It helps in understanding the specific regions of the ACTH molecule that are involved in receptor binding and biological activity. This fragment is also utilized in immunological studies to investigate antibody interactions and epitope mapping. Additionally, it serves as a tool in biochemical assays to explore the mechanisms of hormone signaling and regulation in the endocrine system. Its applications are largely confined to experimental and diagnostic contexts, contributing to advancements in peptide research and therapeutic development.