STEVOR reactivity in merozoite invasion. STEVORs are localized on merozoites (A) in free form, (B) docking, (C and D) invading, (E) invaginating and (F) entering an erythrocyte. Enlarged images (G and H) show staining of comet-like structures. White arrows and arrowheads indicate STEVORs on the merozoite surface and apex, respectively. White circles and ellipses highlight the invasive merozoite and the comet, respectively. Bright field images (first column), STEVOR proteins visualized with green Alexa 594 (second column), merozoite nuclei stained with blue DAPI (third column), overlay of STEVOR protein staining and nuclei (fourth column) and the overlay of bright field, STEVOR protein staining and nuclei (fifth column) are shown.