AZ505 is primarily utilized in biochemical research as a selective inhibitor of the protein methyltransferase SET7/9. This enzyme is involved in the methylation of histone and non-histone proteins, which plays a crucial role in regulating gene expression and cellular processes. By inhibiting SET7/9, AZ505 helps researchers study the effects of protein methylation on various biological pathways, including those related to cancer, inflammation, and metabolic disorders. Its application is particularly valuable in understanding epigenetic mechanisms and developing potential therapeutic strategies targeting methylation-dependent diseases.