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Figure Caption
Fig. 5 Induction of msx gene expression during regeneration of the caudal fin. Blastema cells at the tip of each fin ray express msxB (B) and msxC (C). Cells overlying the blastema express msxA and msxD (A,D). Gene expression was determined 3 d after amputation. The plane of amputation is indicated by an arrow in C-D. The inset in A is the schematic representation of the skeleton of a zebrafish caudal fin. The standard plane of amputation is indicated by a dashed line and corresponds to a level proximal to the first branch point of the lepidotrichia (arrow). Scale bar: 40 μm.
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