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Fig. 3. NgR is expressed on plasma membrane of cultured OECs. (A) OECs were double-stained with antibodies against S-100 and NgR after treatment with Triton X-100 (a-c). OECs (d) and Schwann cells (e) were surface stained (without treatment with Triton X-100) with anti-NgR antibody. (B) Cell lysates from SCs (negative control), OECs and PC12 (positive control) cells were subjected to immunoblotting with anti-NgR (upper panel) and anti-GAPDH (lower panel). The arrowhead points to NgR (80 kDa). (C) Immunostaining for NgR on plasma membrane of OECs before () and after (+) treatment with PI-PLC (0.1 U/ml) at 37°C for 2 hours. (D) The supernatant (S) and membrane fractions (P) of OECs treated (+) or untreated () with PI-PLC (0.1 U/ml) at 37°C for 40 minutes were subjected to immunoblotting with anti-NgR (upper panel) and anti-GAPDH (lower panel). Bars, 50 µm.