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Expression of cytochrome b5 reductase 2 (CYB5R2) in NPC cell lines, NPC biopsies and NNE samples. a RT-PCR analysis of expression of CYB5R2 in NPC cell lines and NNEs. PC: positive control. GAPDH was the internal control. Water was the blank control. b Semi-quantitative RT-PCR of CYB5R2 expression in NNEs and primary NPC tumors. CYB5R2 expression was normalized to that of GAPDH
