Figure 3. Overexpressing HA-cpa suppresses the apical F-actin accumulation of cpbL262R-expressing wing discs, whereas HA-cpaΔABD expression has the opposite effect.
(A–A″ to E–E″) standard confocal sections of the apical cell membrane of third instar wing imaginal discs with dorsal sides up and posterior sides to the left, expressing (A–A′) one copy of UAS-mCD8-GFP (green in A) or (B–B″) UAS-cpb7 and one copy of UAS-mCD8-GFP (green in B) or (C–C″) UAS-cpbL262R and two copies of UAS-mCD8-GFP (green in C) or (D–D″) UAS-cpbL262R, UAS-HA-cpa89E and one copy of UAS-mCD8-GFP (green in D) or (E–E″) UAS-cpbL262R, UAS-HA-cpaΔABD and one copy of UAS-mCD8-GFP (green in E) under hh-Gal4 control. Discs are stained with Phalloidin (white) to mark F-actin and (B–B″ to E–E″) anti-Cpb (cyan blue). The yellow lines outline the anterior-posterior compartment boundary. The scale bars represent 30 µm. (F) Mean intensity of the ratio of Phalloidin signal between posterior and anterior wing compartments of hh-Gal4 driving two copies of UAS-mCD8-GFP (lane 1) or UAS-HA-cpa89E, UAS-cpb7 and one copy of UAS-mCD8-GFP (lane 2) or UAS-HA-cpaΔABD, UAS-cpb7 and one copy of UAS-mCD8-GFP (lane 3) or UAS-cpb7 and one copy of UAS-mCD8-GFP (lane 4) or UAS-cpbL262R and two copies of UAS-mCD8-GFP (lane 5) or UAS-cpbL262R, UAS-HA-cpa89E and one copy of UAS-mCD8-GFP (lane 6) or UAS-cpbL262R, UAS-HA-cpaΔABD and one copy of UAS-mCD8-GFP (lane 7). The mean for lane 1 is 0.922 (n = 12) for lane 2 is 0.775 (n = 8), for lane 3 is 1.435 (n = 10), for lane 4 is 0.977 (n = 10), for lane 5 is 1.175 (n = 16), for lane 6 is.0.937 (n = 14), for 7 is 2.348 (n = 6). Error bars indicate s.e.m.. *** indicate P<0.0001.
