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Neurotrophin expression 1 day after injury. BDNF, brain-derived neurotrophic factor; NGF, nerve growth factor; NT-4, neurotrophin-4; C, control. Section = 5 μm. The antibodies are visualized with diaminobenzidine tetrahydrochloride (DAB) and show as a brown color, indicating expression of neurotrophin. Sections were counterstained with hematoxylin (blue). Bar = 100 μm.
