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Fig. 3. Activation and repression by DL variants visualized by double
labeling. (A-D) TWI protein expression was monitored by antibody
staining (red, left), while zen mRNA expression was monitored by in
situ hybridization (blue, right). Sagittal, confocal sections of the embryos
are oriented with anterior on the left and the dorsal side at the top.
Maternal genotypes are described in the Materials and methods.