PI-PLC treatment of permeabilized T. gondii tachyzoites. Hypotonically permeabilized tachyzoites were labeled in vitro via UDP-[6-3H]GlcNAc in the presence of EDTA and absence of Mn2+ (A to C), GDP-[2-3H]Man (D to F), or UDP-[6-3H]Glc (G to I). Glycolipids were extracted and analyzed by TLC before (A, D, and G) and after B. thuringiensis PI-PLC treatment in the absence (B, E, and H) or presence (C, F, and I) of Triton X-100. Radioactivity was detected by a Berthold TLC scanner (LB 1842).