mRNA levels of genes involved in regulating iron homeostasis in Ndfip1^+/+ and Ndfip1^−/− mice fed either a low-, normal, or high-iron diet. (A) Slc11a2 (+IRE isoform), (B) Heph, and (C) Slc40a1 in the duodenum. These genes are involved in iron uptake from the diet. (D) Slc11a2 (-IRE isoform), (E) Tfrc1, and (F) Hamp in the liver. These genes are involved in iron storage. Slc11a2, DMT1; Heph, hephaestin; Slc40a1, ferroportin 1; Tfrc, transferrin receptor 1; Hamp, Hepcidin. All genes respond to the different diets as expected. Data represent mean ± SE, *P < .05, n = 7-9.