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Cells were grown in the nutrient solution for 5 days, and then transferred to iron-limited (Fe0.1) media with or without 8 µM CO for 8 days. Thereafter, the total iron in whole cells was quantified. Vertical bars represent standard deviation of the mean (n = 3). Asterisk indicates that mean values are significantly different between the treatments of Fe0.1 + CO or HO/OX, HO/KO and Fe0.1 (control) (P<0.05).
