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a-dfoxq1a gene expression. a Expression in ventral head region is found in 1.5 dpf embryo (arrow). b Prominent expression at 2.5 dpf in the craniofacial region (arrows, higher magnification in c), on the yolk (arrows, higher magnification in d), and along the body abutting the yolk. Yolk expression is not found in all embryos analyzed whereas the craniofacial expression is. e-f As a negative control, whole mount in situ hybridization using the sense RNA probe for foxq1a does not show any expression at all stages analyzed from 1–3 dpf. g foxq1b expression is prominent in the craniofacial jaw region. Left, lateral view (arrow). Right, ventral view (arrows).
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