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Figure Caption
Fig. 1 Cell proliferation during segment growth appears pulsatile. A: Overlayed images of ZNS5+ cells (osteoblasts) in brown and bromodeoxyuridine-positive (BrdU+) cells in red. Arrowheads indicate joints. BrdU+ cells distal to the most distal joint were counted (boxed region) from individual fin rays and plotted against the length of the ultimate segment from the same fin. B: Number of BrdU+ cells in the longest fin ray in the ventral lobe. C: Number of BrdU+ cells in the shortest fin ray in the fin. Each data point in B and C represents a single fin ray. N = 28 rays.
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