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Fig. 6. retn expression during metamorphosis. retn-Gal4/+;
UAS-mGFP expression in late larval (A,D,G,J), early pupal (B,E,H,K), and late
pupal/early adult (C,F,I,L) stages. (A-L) Anterior is upwards. (A-C)
retn expression labels subsets of CNS neurons through metamorphosis:
mushroom bodies (arrowheads), subesophageal ganglion (arrows) and ventral
abdominal ganglion (asterisks). (D-F) retn labels 
and ß
mushroom body processes in the larval CNS (D). These projections are pruned in
24-hour-old pupae (arrow in E). In 48-hour-old pupae, expression can be seen
in all MB lobes, but expression subsequently fades in non-/ß
projecting neurons (F). (G-I) Subesophageal ganglion cells remain constant in
number, but show remodeling of projections from larval (G) to early (H) and
late (I) pupal patterns. (J-L) Eighteen larval retn-expressing
abdominal ganglion cells (arrow, J) reduce to 12 in early pupae (arrow, K).
Six neurons are present (arrow, L) in late pupal stages.
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