The parasite COPII protein PfSec24a labels discrete tER sites.

A. PfSec24a-GFP marks 1-2 foci in ring stages (first row) and 2-3 foci in trophozoite stages (second row, parasites labelled `P' in a doubly infected erythrocyte). Proliferation of tER sites accompanied the onset of nuclear division in early schizonts (third row). Late in the intraerythrocytic cycle, however, only a single spot of PfSec24a-GFP is associated with each nucleus in late schizonts (fourth row). Similarly, released merozoites typically possess a single spot of PfSec24-GFP fluorescence (fifth row).

Lee MC, Moura PA, Miller EA, Fidock DA. Plasmodium falciparum Sec24 marks transitional ER that exports a model cargo via a diacidic motif. Mol Microbiol. 2008 68(6):1535-46.