Fig. 5. Arm acts downstream of zw3, and is independent of the increased levels present in zw3 germline clones. Confocal microscope images of stage 9 embryos showing Arm protein (N2, green) and nuclei (Hoechst, blue). (A) A wild-type embryo, OreR. (B) zw3^M11-1;ArmGAL4/+ crossed to wild type. The embryo was also stained with -Sxl to separate out the females (not shown). (C) zw3^M11-1; ArmGAL4/+ crossed to Arm. The embryo was also stained with -HA to find embryos expressing Arm, and with -Sxl to separate out the females (not shown).