Fig. 4

Levels of unsaturated (a) and saturated (b) fatty acids identified in the metabolomics analysis. The relative values of fatty acids identified are shown as the fold change from ID (open bar) to IR (closed bar) (ID/IR) cells. Significance is indicated by asterisks: *P < 0.05; **P < 0.01; ***P < 0.001. IR, iron-rich; ID, iron-deficient