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To secure iron from transferrin, hepatocytes use two pathways, one dependent on transferrin receptor (TfR 1) and the other, of greater capacity but lower affinity, independent of TfR 1. To clarify further similarities and differences of the two pathways, we have suppressed TfR 1 by 75-80% in human hepatoma-derived HuH-7 cells co-transfected with vectors bearing full-length TfR 1 cDNA or its first...
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