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Triplicate flasks of BEAS 2B cells were exposed to 5 μM Cr(VI) for 4 or 24 h, after which nuclear proteins were isolated and quantified. Each treatment group was pooled and samples were analysed for protein binding to DNA cis-elements by the protein/DNA arrays I and II. Densitometric analysis of the blot was performed and results are presented as fold change over control.
