Dietary iron modulates ferritin L, ferritin H, and TfR1 in the liver. Liver homogenates were analyzed for expression of ferritin H, ferritin L, and TfR1 by Western blotting as described in “Western blots.” Shown are means and SD; n = 5. Protein levels showed a statistically significant change in response to iron dose (P < .001 for ferritin H and L and < .05 for TfR1).