Fig. 5.
Both Irp1 and Irp2 bind to the HIF2α IRE. Band-shift experiments were done with MEF cells to measure the HIF2α IRE and ferritin IRE binding activities of Irp1 and Irp2 following a published method (Ghosh et al., 2008). HIF2α is highly expressed in brain endothelial cells (Tian et al., 1997).