Fig. 6From: Lacking catalase, a protistan parasite draws on its photosynthetic ancestry to complete an antioxidant repertoire with ascorbate peroxidaseIndirect immunofluorescence of PmAPX1 and PmAPX2 in cultured P. marinus trophozoites. Early log phase cultures were fixed, stained with PmAPX1- or PmAPX2-specific IgG, followed by Alexa488 labeled secondary antibody. Nuclei were visualized with DAPI. PmAPX1 localized to the cytoplasm and PmAPX2 localized to the margin the vacuoles. Bar = 2.5 μm. DIC = differential interference contrast imagingBack to article page