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Cellular distribution of DAO enzymatic activity in human corticospinal tract. DAO enzyme histochemistry in the gray (A) or white (B) matter of PMC, thoracic spinal VH (C), or LCST (D,E) in humans was double stained with npNFH, a marker for motor neurons, or GFAP, an astrocytic marker. (C–E) The lower right panel is higher magnification of a white square in the lower left. The arrowheads point to blanks indicating the myelin sheath. The asterisk shows blood vessel. Scale bars, 200 μm.
