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Serotonergic axons express CatB. A, Spinal cord tissue processed from T8-contused rats that were treated with DMSO vehicle or 22 μg/ml ISP for 7 weeks following injury. At 7 weeks after the last ISP treatment, spinal cord tissue was stained to visualize serotonin (5-HT) and CatB. Scale bar, 500 μm. B, Western blot of injured spinal cord lysates collected from female rats given a thoracic level 8 (T8) contusion and treated with vehicle or 22 μg/ml ISP for 14 d. n = 2.
