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In situ hybridization of ser1 (A and B), fhxh4 (C and D), and fhxh5 (E and F). A, C, and E are the silk glands of Ayfib-GAL4/+, and B, D, and F are those of Ayfib-GAL4/UAS-Antp individuals. Yellow arrowheads indicate the PSG. Scale bar, 0.3 cm.
