Figure 1.

Immunolocalization of brain-derived neurotrophic factor in human intervertebral discs. (a) Outer annulus, subject number 14, L3 to L4. (b) Outer annulus, subject number 4, L1 to L2. (c) Nucleus, subject number 14, L3 to L4 (arrow marks nearby negative cell). (d) Outer annulus, subject number 4, L1 to L2 (note nearby cell that does not show localization). (e) Inner annulus, subject number 14, a cluster of cells (arrow marks one of the negative cells that lies near the positive cells). (f) Negative control. Bars: (a) 10 μm, (b) 0.1 μm, (c) 10 μm, (d) 10 μm, (e) 10 μm, (f) 10 μm.

Gruber et al. Arthritis Research & Therapy 2008 10:R82   doi:10.1186/ar2456
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