Indirect immunofluorescence assay and confocal microscopy of late stages of P. falciparum-infected erythrocytes and free merozoites. P. falciparum parasites were probed using rat anti-DegP antibody followed by fluorescein isothiocyanate-conjugated anti-rat IgG (green). Other marker proteins were stained with the rabbit antiserum/antibody followed by Cy3-conjugated anti-rabbit IgG (red). PfSera5 and PfMIF were used as markers for parasitophorous vacuole and secretory protein in the culture supernatant, respectively. Significant merging of the fluorescent signal for DegP was observed with SERA5 and MIF signals, indicating the presence of DegP in the cytosol of infected RBCs.

Sharma S, Jadli M, Singh A, Arora K, Malhotra P. A secretory multifunctional serine protease, DegP of Plasmodium falciparum, plays an important role in thermo-oxidative stress, parasite growth and development. FEBS J. 2014 281(6):1679-99.