Evidence for a sequential transfer of iron amongst ferritin, transferrin and transferrin receptor during duodenal absorption of iron in rat and human

Figure 3 Microautoradiography demonstrated the sequential transfer of iron: Microautoradiography of duodenal sections of intestine obtained after oral administration of 100 μCi of ⁵⁹FeCl₃ and 250 g of carrier iron in iron deficient top panel (ID), control middle panel (C) and iron overload bottom panel (OL) rats. These photographs illustrate the progressive transfer of iron into the villi (25 x).