Relative gene expressions - ferritin heavy chain (FTH), ferritin light chain (FTL), ferroportin (SLC40A1, transferrin receptor 1 (tfr1, TFRC) - normalized to 18sr RNA expression after iron treatment (FeSO4, 250 µM) for 24 h. *P < 0.05 (unpaired Student's t-test versus Basal). 