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Neuromuscular junctions are reformed after GGF2 withdrawal. A–C, A junction in a normal 7-week-old soleus muscle. D–F, A junction in a soleus muscle treated with GGF2 from P4 through P9 and allowed to recover for 6 weeks. Junctions were triple-labeled as in Figure 2. Note the simplicity of the recovered junction compared with a normal junction of the same age. Scale bar, 30 μm.
