Immunoelectron micrograph showing localisation of parasitophorous vacuole membrane (PVM)-associated antigen, QFll6. Prior to embedding in LR White resin, parasitised erythrocytes were fixed with 0.05% glutaraldehyde (colloidal gold 15 nm). a Labelling is clearly associated with the pvm, which is distinct from the parasitic plasma membrane, b Antigen QF116 is also evident, clustered in vesicles within the erythrocytic cytoplasm. P, parasite; PM, parasitic membrane; P VM, parasitophorous vacuole membrane; RBC, erythrocytic cytoplasm. Bar=0.5 mm

Ingram LT, Stenzel DJ, Kara UA, Bushell GR. Localisation of internal antigens of Plasmodium falciparum using monoclonal antibodies and colloidal gold. Parasitol Res. 1988;74:208-15.