What is the primary function of the protein DMT1 in the context of iron metabolism in erythropoiesis?

A Transport of iron from the gut into the bloodstream
B Transport of iron from the endosome into the cytosol of erythroid precursors ✓
C Storage of iron in ferritin
D Regulation of hepcidin expression

Explanation

DMT1 is a transmembrane protein responsible for transporting iron from the endosome into the cytosol of erythroid precursors, where it can be used for heme synthesis.

Source

Molecular Biology of the Cell, Alberts et al.
Hematology Hematology: Anemia Hematology: Anemia Hard MEDICAL Confidence: high