Fig 2. The mutagenesis of LL-37+Fe²⁺ combination is suppressed by the addition of an iron chelator.

This supports the notion that iron is causal in increasing mutagenesis (A). In the same line, over-expression of Dps, a natural iron chelator in bacteria, also decreases the mutant frequency to rifampicin (B). Error bars represent 95% confidence intervals for mutant frequencies.