WR99210 is primarily utilized in the field of malaria research and treatment. It serves as a potent antimalarial agent, particularly in studies involving drug resistance. Researchers use it to investigate the mechanisms of resistance in Plasmodium falciparum, the parasite responsible for the most severe form of malaria. Its application extends to the development of new antimalarial drugs, where it is employed to test the efficacy of novel compounds against resistant strains. Additionally, WR99210 is used in genetic studies as a selective marker to modify and study the parasite's genome, aiding in the understanding of its biology and the identification of potential therapeutic targets.