Figure 5From: Brain-derived neurotrophic factor and its receptor in the human and the sand rat intervertebral discImmunolocalization of brain-derived neurotrophic factor in sand rat intervertebral discs. (a) Immunolocalization of brain-derived neurotrophic factor in a lumbar sand rat intervertebral disc. OA, outer annulus; IA, inner annulus; arrow, negative cell in the IA. (b) Negative control. Bars = 50 μm.Back to article page