Mastoparan is widely used in biochemical research due to its ability to interact with cell membranes and modulate cellular processes. It is particularly known for its role in activating G proteins, making it a valuable tool in studying signal transduction pathways. Researchers utilize mastoparan to investigate mechanisms of hormone and neurotransmitter action, as well as to explore the function of G protein-coupled receptors (GPCRs). Additionally, its membrane-disrupting properties are employed in studies related to cell permeability and the delivery of molecules into cells. Mastoparan is also used in antimicrobial research, as it exhibits activity against certain bacteria and fungi, providing insights into the development of novel therapeutic agents.