SL-327 is primarily used in research settings as a selective inhibitor of MEK (MAPK/ERK kinase), which plays a crucial role in the MAPK/ERK signaling pathway. This pathway is involved in cell proliferation, differentiation, and survival, making SL-327 a valuable tool for studying its biological functions. Researchers often use SL-327 to investigate the effects of inhibiting this pathway in various cellular and animal models, particularly in the context of cancer, neurological disorders, and developmental processes. By blocking MEK activity, SL-327 helps elucidate the role of the MAPK/ERK pathway in disease mechanisms and potential therapeutic strategies.