Figure 3. Expression pattern of
ttm-1. Fluorescence microscope images of live transgenic hermaphrodites expressing GFP under the control of (A) the predicted
ttm-1a promoter [Pttm-1a::GFP] and (B) the predicted
ttm-1b promoter [Pttm-1b::GFP]. The left panel shows an entire worm, and both promoters are expressed in intestinal cells. Right panels are magnified views of hypodermal and intestinal expression driven by the
ttm-1a promoter and head neuron and seam cell expression driven by the
ttm-1b promoter. To visualize the relatively weak GFP fluorescence in head neurons, we used a longer exposure time compared to Figure 4B. Scale bars represent 100 mm (left) and 10 mm (right).