"We analyzed the expression of a GFP reporter driven by this same
ceh-14 promoter fragment (
ceh-14:GFP; kindly provided by I. Hope), and found that its expression was specifically decreased in ALA in the
ceh-17(
np1) mutant (Fig 2A). The defect could not be detected by eye, but quantification of fluorescence revealed a significant decrease in ALA-specific expression across larval stages."