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Effects of NDRG2 overexpression on the migration of A549 cells in an in vitro assay. A fixed number of cells were plated onto the upper part of the transwell chamber. After incubation for 6 hr, invasive cells were counted at the lower part of transwell filter. Representative micrographs from the lower surface of the transwell filter. Overexpression of NDRG2 significantly suppressed their migration through the transwell. *P< 0.001 (values are compared with control cells)
