Fig. 4. Embryonic origin of laminar pattern. (A,A') Expression of ppk-eGFP in larval class IV sensory cell bodies, dendrites and axons, and expression of photoconverted Kaede protein under the control of Gal4^109(2)80 to label all da neurons. Labeled oenocytes are encircled. (B) Dorsal view of stage 17 embryonic scaffold of class IV axons (arrowhead) flanked on both sides by other da axons expressing red Kaede protein (arrows). (C) The laminar pattern of class IV neurons (arrowhead) and other da neuron (arrow) in early larval stages. Scale bars: 50 µm in A,A'; 10 µm in B,C.