T. brucei ILTat 1.3 was suspended in a transformation medium (SDM-79) at of 4 × 106/ml and incubated at 27°C. At 24 h intervals, 2 × 107 parasites were harvested. (A), Total GPI-PLCp activity (Units/107 cells) was determined. Activity in cells at day 0 of differentiation was assigned a value of 100%. (B), Cell density during differentiation of ILTat 1. (C), Western blotting with anti-VSG117 (106/lane), anti-procyclin (6 × 106/lane), or anti-tubulin antibody (2 × 106/lane). PCF, established procyclic; Day #, refers to days post initiation of differentiation; TUB, tubulin.