Fig. 8. Brk reduces the rates of cell proliferation. The upper panels show two discs of genotype nub-Gal4>UAS-brk UAS-GFP doubly stained for GFP and PH3 (left) and GFP and BrdU (right). In both cases, there is a marked reduction of both PH3 or BrdU (red) in the cells expressing brk. In the lower panels, two discs of genotype hh-Gal4>UAS-brk UAS-GFP show a similar result.