Fig. 9. Structural MB defects caused by overexpression of FAS II. Lateral views of larval MBs at wandering third instar stage. GAL4 drivers are (A) elav-GAL4, (B-D) OK107, (E) 201Y and (F) 238Y. Reporters are UAS-mCD8::GFP in all cases (green). Insets show cross sections of peduncles with phalloidin staining (magenta). Arrowhead in A, malformed thin dorsal lobe. (B) MB with type 1 defects (Table 2). Note the blunt medial lobe as compared with the wild-type medial lobe in F, which terminates in three blobs. (C) MB with type 2 defects. Note the malformed thin dorsal lobe (arrowhead). (D) MB with type 3 defects. Note the malformed medial lobe (arrowhead) and expansion of the dorsal lobe. Scale bar: 20 µm. DL, dorsal lobe; ML, medial lobe; Ped, peduncle.