Confocal immunofluorescence images, Left column (red): PfPK5 immunofluorescence; middle column (green): TOT0 1; right column: composite. (A) Parasites of various ages - upper row: two parasites, less than 30 h old; middle row: parasite, 30-36 h old; lower row: parasite, older than 40 h. The upper two size bars are 2.5 mm, the one in the bottom row 2 mm. (B) Three parasites at the time of nuclear divisions. Note the nuclear localization of PfPK5. The size bar is 5 mm.Graeser R, Wernli B, Franklin RM, Kappes B. Plasmodium falciparum protein kinase 5 and the malarial nuclear division cycles. Mol Biochem Parasitol. 1996 82:37-49. Copyright Elsevier 2009.