GOE 6983 is primarily used as a selective inhibitor of protein kinase C (PKC) isoforms, particularly PKCδ. It is widely employed in research settings to investigate the role of PKC signaling pathways in cellular processes such as apoptosis, cell proliferation, and insulin resistance. Due to its ability to cross cell membranes effectively, it is useful in both in vitro and in vivo studies. Researchers use GOE 6983 to explore mechanisms in neurodegenerative diseases, diabetes, and cancer, where PKCδ activity is implicated. Its selectivity makes it a valuable tool for dissecting specific PKC isoform functions without broadly affecting other kinases.