Immunoelectron microscopy of LR White sections of asexual schizont stage were fixed in 1% paraformaldehyde:0.2% glutaraldehyde and incubated with sera (M40) against E. coli-produced Pfs40 MBP-fusion protein. Arrows point to labeling with gold particles. Nucleus (N); erythrocyte cytoplasm (EC). Bar equals 2.0 mM. This result indicates localization in a membrane-bound compartment adjacent to the nucleus that is suggestive of endoplasmic reticulum

Templeton TJ, Fujioka H, Aikawa M, Parker KC, Kaslow DC. Plasmodium falciparum Pfs40, renamed Pf39, is localized to an intracellular membrane-bound compartment and is not sexual stage-specific. Mol Biochem Parasitol. 1997 ;90:359-65. Copyright Elsevier 2009.