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. 2013 Mar 20;5(3):957–970. doi: 10.3390/nu5030957

Figure 1.

Figure 1

Overview of the SMAD/BMP pathway in hepatocytes. Iron-saturated transferrin acts like a hepcidin transcription switch. Low levels of iron-saturated transferrin destabilizes the TfR-HFE complex, preventing the phosphorylation of R-SMAD, which represses hepcidin transcription.