Regulation of NF-κB–dependent target genes by NaAsO₂ HDLM-2 cells were treated for 20 hours with the indicated concentrations of NaAsO₂. (A) Whole cell lysates were analyzed by Western blotting for the expression of c-IAP2, TRAF1, and Bcl-x_L; n.s. indicates nonspecific. (B) Total mRNA was analyzed by Northern blotting for expression of CCR7, IL-13, and GAPDH.