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mRNA levels in HK-2 cells incubated for 18 h under control conditions or subjected to 18 h of Fe [Fe gluconate (FeG) or Fe sucrose (FeS)] challenge. Both Fe challenges raised each of the mRNA levels. The increase was greater with FeS than FeG, consistent with the fact that FeS gains greater intracellular HK-2 access than does FeG.
