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. 2012 Jan 12;7(1):e30251. doi: 10.1371/journal.pone.0030251

Figure 2. Recognition of native proteins.

Figure 2

Anti-EBA-175RII antibodies are able to detect native EBA-175 protein of 175 kDa from 3D7 parasite lysates (Lane 1, panel A). Anti-EBA-175RII/rRH5 (sera from the combined vaccine) is able to detect both EBA-175 and RH5 native proteins from the same lysate (Lane 2, panel A; EBA-175 indicated by top arrow; RH5 indicated by bottom arrow). Anti-rRH5 antibodies are specific for the native 65 kDa RH5 protein from 3D7 parasite lysate (panel B; indicated by arrow). All products were visualized with ECL after immunoblotting. Immunofluorescent detection of EBA-175 and RH5 in mature and rupturing 3D7 schizonts. Parasites were labelled with anti-EBA-175RII (panel C) or with anti-rRH5 (panel D) at dilutions of 1∶100 and 1∶500, then the slides were incubated with FITC-conjugated anti-mouse IgG (green) and mounted with 10 mg/mL DAPI (blue). EBA-175 and RH5 are each localised to the apical end of merozoites. Non-staining with preimmune sera (1∶100 dilution) confirm specificity of each antibody to its respective antigen.