LMP-1 expression in clinical NPC samples and NPC cell lines and its correlation to SATB1. (A) Representative photograph of LMP-1 expression in NPC samples examined by immunohistochemistry (IRS >6.0). (B) Association between LMP-1 and SATB1 expression in clinical NPC samples. (C) Immunofluorescence staining, (D) Western blotting and (E) RT-PCR were used to detect the LMP-1 expression in well-differentiated CNE1, poorly-differentiated CNE2Z and un- differentiated C666-1 cell lines. β-actin was used as a loading control.