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. 2015 Jun 26;11(6):e1005303. doi: 10.1371/journal.pgen.1005303

Fig 2. The early pattern of photoreceptor axon projections is affected in otd mutants.

Fig 2

Wild-type (A) and otd uvi mutant (B) eye imaginal discs from third instar larvae stained for the neural marker Elav (blue) and for the R7- and R8-specific markers Pros (red) and Sens (green) respectively. Asterisks indicate the position of the bristle cell. Wild-type (C) and otd uvi (D) photoreceptor axon projections in third-instar larva were visualized by expressing UAS-mCD8::GFP under the control of the GMR-Gal4 driver [43]. The growth cones of R1-R6 form a neural plexus (chevrons) at the lamina (L). R8 axons project to the medulla neuropile (M). bn stands for the Bolwig’s nerve.