Fig. 7. Dynamics of cell divisions during melanocyte regeneration. (A,B) The history of cell divisions in melanocyte lineages during larval melanocyte regeneration was determined by pulse-labeling with BrdU for 24 hours at various stages during or after MoTP treatment. Quantitative analyses of BrdU incorporation were conducted in larvae exposed to MoTP from 14 to 72 hpf (A), or 4 to 5 dpf (B). Black and white bars indicate BrdU incorporation in untreated and MoTP-treated larvae, respectively. Horizontal green lines indicate periods of BrdU labeling. Asterisks in A and B indicate the developmental stages at which larvae were sacrificed for BrdU incorporation analysis.