Expression analysis of MSP3-like ORFs. IFA analysis of acetone-fixed thin smear of the blood stage parasites, using the same antibodies used for Western blot analysis, shows merozoite surface staining. The size-bar drawn in the lower right-hand corner of each microscopic field represents 5 mm. Antibodies affinity-purified against the unique region of MSP3.5 did not react to parasite proteins in IFA.Singh S, Soe S, Weisman S, Barnwell JW, Pérignon JL, Druilhe P. A conserved multi-gene family induces cross-reactive antibodies effective in defense against Plasmodium falciparum. PLoS One. 2009;4(4):e5410.

Immunofluorescence of a representative schizont and representative merozoites of the DR line using anti-HA antibodies (green) and DAPI staining (blue). MSPDBL2 localizes to the merozoite surface, despite lacking a membrane anchor.Van Tyne D, Uboldi AD, Healer J, Cowman AF, Wirth DF. Modulation of PF10_0355 (MSPDBL2) alters Plasmodium falciparum response to antimalarial drugs. Antimicrob Agents Chemother. 2013 57(7):2937-41

Processed Peripheral MSPs become part of an anchored complex late in schizogony. Immunofluorescence assays of Trophozoites (28-32 hr) in columns 1 (Phase + 488 + DAPI) and 2 (488 + DAPI), Schizonts (44-48 hr) in columns 3 (Phase + 488 + DAPI) and 4 (488 + DAPI) and PEMS (E64 treated) in columns 5 (Phase + 488 + DAPI) and 6 (488 + DAPI) were probed with monoclonal antibodies (green); 9A6 (anti-MSP1 p83), 9A12 (anti-MSP3), 2C12 (anti-MSP6), 7H12 (anti-MSPDBL1), 4A7 (anti-MSPDBL2) and 8F1 (anti-MSP7). EXP2 was used as an expression control probed with polyclonal rabbit anti-EXP2 antibodies (red). The nuclei of parasites are stained with DAPI (blue).Lin CS, Uboldi AD, Epp C, Bujard H, Tsuboi T, Czabotar PE, Cowman AF. Multiple P. falciparum Merozoite Surface Protein 1 Complexes Mediate Merozoite Binding to Human Erythrocytes. J Biol Chem. 2016 Jan 28. [Epub ahead of print] PMID: