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Fig. 6. Reduction of tsh function results in small eyes. (A,B) Lateral views of (A) wild-type and (B) ey-GAL4; arm-GAL4/UAS-tshRNAi adult heads. (C-F) Clones expressing tshRNAi, positively marked with lacZ (blue) and Tsh (green). (C,D) Late L3 disc showing autonomous loss of Tsh-immunoreactivity (arrows). (E,F) Close up of a dorsal clone in which cells have different levels of Tsh immunoreactivity: none (arrow) or normal (arrowhead).