Fig. 2. A reconstruction of a late stage merozoite bud, still attached (constriction ring) to the parasite's residual body. At this stage of development, the micronemes are migrating apically from the Golgi cisterna beneath the f-MAST (in this example, composed of three microtubules) but the formation of dense granules has not yet commenced. This reconstruction was made from a series of 19 consecutive longitudinal sections.