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Metabolic activity of wild-type yeast and two yeast mutants ΔSod1 and ΔCtt1 treated with different combinations of metal ions: stainless steel (A), cobalt-chromium Elgiloy (B), Remaloy (C), nickel-titanium (D), and β-titanium (E). For each yeast strain, the untreated control group represents 100% (dotted line). A comparison among untreated control groups of each yeast strain is shown in the graph (F).
