Expression of glutamine synthetase in the life cycle. Immunofluorescence analysis of GS expression in Pf; rings (R), trophozoites (T) and schizonts (S). Scale bar = 5 μM. For a–c, n =3 independent experiments. Lower panel: Immunofluorescence analysis of GS expression in Pf gametocytes (Stage I-V). Scale bar = 5 μM