RK-287107 is a potent and selective inhibitor of the enzyme casein kinase 2 (CK2), which plays a key role in cellular processes such as proliferation, survival, and apoptosis. Due to its ability to specifically target CK2, this compound is widely used in cancer research to investigate signaling pathways involved in tumor growth and progression. It has shown promising activity in preclinical studies against hematological malignancies, including multiple myeloma and leukemia, by inducing cell cycle arrest and apoptosis in cancer cells. Its application extends to combination therapy studies, where it enhances the efficacy of other anticancer agents by suppressing pro-survival signals in tumor cells. RK-287107 is primarily used as a research tool in molecular and cellular biology to dissect the role of CK2 in disease mechanisms and to support the development of targeted cancer therapies.