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Figure Caption
Fig. 7 Retinoic acid acts via the conserved region upstream of wt1a. Embryos of the indicated transgenic lines were treated either with 1 μM all-trans retinoic acid (atRA) or 0.1% DMSO (vehicle) from 12 hpf (6-somite stage) to 24 hpf. Subsequently, embryos were embedded in 3% methyl cellulose and imaged with a fluorescence stereomicroscope (dorsal view). RA- and vehicle-treated embryos of each line were captured together. Note that the weak fluorescence signal of the vehicle-treated wt1a-6.8kb::GFP embryos is due to the short exposure time used for recording the image.
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