Figure 2. The
rgef-1 Promoter Is Active in Neurons An
rgef-1::GFP transgene was expressed in C. elegans. Accumulation of GFP was monitored by fluorescence microscopy. (A), (C), and (E) show GFP fluorescence; (B), (D), and (F) are corresponding phase micrographs. (A) and (C) show the
rgef-1 promoter is active throughout the nervous system. GFP is evident in head neurons (H), nerve ring (NR), tail neurons (T), and nerve cord (NC). (E)
rgef-1 promoter activity is initially observed in late embryos.