Immunofluorescence assays were done on human red blood cells infected by P. falciparum 3D7 strain and revealed by anti-PfEK. Nuclei stained blue with DAPI. Differential interference contrast (DIC) images and merges are shown. Three representative parasitic stages are shown: ring, mature trophozoite and schizont. The antibody was seen to be spread throughout the parasite cytoplasm.Alberge B, Gannoun-Zaki L, Bascunana C, Tran Van Ba C, Vial H, Cerdan R. Comparison of the cellular and biochemical properties of Plasmodium falciparum choline and ethanolamine kinases. Biochem J. 425:149-58, 2009 © The Biochemical Society 2009.