Glucagon (19-29)(human) is primarily used in research studies to investigate its biological activity and mechanisms. It serves as a truncated form of glucagon, allowing scientists to explore its role in glucose metabolism and its interaction with glucagon receptors. This peptide is particularly useful in understanding the structure-activity relationship of glucagon, aiding in the development of therapeutic agents targeting metabolic disorders such as diabetes. Additionally, it is employed in biochemical assays to study receptor binding and signal transduction pathways, providing insights into potential drug targets for managing blood sugar levels.