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The reverse expression and functional interaction of FHL2 and Id2 was induced by retinoic acid (RA) in human neuroblastoma cells. (A) Northern and western blot analyses of FHL2 and Id2 gene expression in SH–SY5Y and SK–N–SH cells treated with RA (1 μM) for the indicated times. β-actin is used as a loading control. (B) SH–SY5Y cells were treated with RA (1 μM) for the indicated times, lysed and underwent CoIP experiments with the indicated antibodies.
