Ferritin heavy chain fragment [Multiple species]

Ferritin is a protein of 450 kDa consisting of 24 subunits that is present in every cell type. Invertebrates, these subunits are both the light (L) and the heavy (H) type with an apparent molecular weight of 19 kDA or 21 kDA respectively. The ferritin found in cancer cells was found to consist mainly of H chains. The heavy chain of Ferritin also possesses ferroxidase activity, this involves the conversion of iron from the ferrous (Fe2+) to ferric (Fe 3+) forms [1][2][3][4].