The primary iron storage molecule in cells is which of the following?

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Ferritin is the primary iron storage protein in cells, storing iron in a soluble, non-toxic form and releasing it when needed. Ferritin is the major protein used for intracellular storage of iron. Ferritin without bound iron is referred to as apoferritin. Apoferritin is a large polymer of 24 polypeptide subunits. This multimeric structure of apoferritin is able to bind up to 2000 iron atoms in the form of ferric phosphate. The majority of intracellularly stored iron is found in the liver, skeletal muscle, and reticuloendothelial cells.

The Primary Iron Storage Molecule in Cells Is Which of the Following