Fig. 4

Interacting red and green fluorescent trypanosomes. Trypanosomes from proboscides of tsetse infected with the TCS cross Gam2 RFP and 1/148 GFP (dissected 28 days post-infection). Panels A - C show examples of red and green fluorescent trypanosomes in close contact; the interacting cells are clearly of different sizes in B. In Panel D the trypanosome appears to have two anterior ends, suggesting recent cell fusion and exchange of cytoplasm. From left to right: phase contrast, green fluorescence, red fluorescence, merge of red and green fluorescence. Scale bar = 10 µm