Fig. 4. Electron micrographs of BSF line Bp2T7/ARL1. (A,B) Cells grown in the presence of tetracycline for 36 hours. F, flagellum; FP, flagellar pocket; GA, Golgi apparatus; MVB, multi-vesicular body; N, nucleus. The Golgi apparatus from cells grown in the absence (C) and presence (D-F) of tetracycline. Image D is an enlarged view (x4.5) of the boxed area in B. Bar, 1 µm (A,B); 0.2 µm (C-F).