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Figure 4


Fig. 4. Distinct temporal patterns of GAL4-LBD activation in the amnioserosa. GAL4-LBD activation patterns are shown for five receptors: E78 (A-C), DHR38 (D-F), DHR3 (G-I), HNF4 (J-L) and EcR (M-O). The earliest activation in the amnioserosa is detected in stage 9-10 GAL4-E78 (A), GAL4-DHR38 (D), and GAL4-DHR3 (G) embryos. HNF4 embryos (J) show activation in the yolk nuclei at this stage (arrows). At stage 12, activation is detected in the amnioserosa of GAL4-E78 (B), GAL4-DHR38 (E), GAL4-DHR3 (H) and GAL4-HNF4 (K) embryos. At stage 13-14, activation in the amnioserosa is detected in all lines and becomes visible in GAL4-EcR embryos (O). The amnioserosa is indicated with arrowheads.