PAM3, or Pam3CSK4, is a synthetic lipopeptide that mimics the structure of bacterial components. It is primarily used in research to activate the immune system, particularly through the stimulation of Toll-like receptor 2 (TLR2). This activation can enhance the body's response to infections and is valuable in vaccine development. In laboratory settings, PAM3 is often employed to study immune responses and the mechanisms of inflammation. Its ability to trigger immune pathways makes it a useful tool for understanding how the body recognizes and responds to pathogens, contributing to advancements in immunology and therapeutic strategies.