Apical localization of PfRH5 in the merozoite.

<p>A Mature Dd2 schizonts were labeled with rabbit anti-PfRH5 IgG and counterstained with FITC-labeled anti-rabbit IgG (green) using immunofluorescence microscopy. B Colocalization studies: Mature Dd2 schizonts were double-labeled with anti-PfRH5 IgG (red) and anti-RhopH3 (green) monoclonal antibody. The merged staining (yellow) by both antibodies indicates their similar location within the parasite. C Immunoelectron microscopy confirming the localization of PfRH5 in the rhoptries within the developing merozoites in the Dd2 schizont. Parasites were fixed with 1% paraformaldehyde and 0.1% glutaraldehyde. Staining was detected with rabbit anti-RH5 and anti-rabbit gold (10 nm). Scale bar represents 500 nm.