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β-Galactosidase activity is present postnatally in subsets of motor neurons in the RegIIIβ KO mouse. (A) Motor neuron in the facial motor nucleus at P3. (B) Sacral motor neurons at P1. (C) Punctate β-galactosidase staining in the facial motor nucleus at P5. [Scale bars: 20 μm (A); 60 μm (B); 40 μm (C).]
