Human Coproporphyrin,CP ELI

Ceruloplasmin is a blue, copper-binding (6-7 atoms per molecule) glycoprotein.

It has ferroxidase activity oxidizing Fe(2+) to Fe(3+) without releasing radical oxygen species.

It is involved in iron transport across the cell membrane.

Provides Cu(2+) ions for the ascorbate-mediated deaminase degradation of the heparan sulfate chains of GPC1.

May also play a role in fetal lung development or pulmonary antioxidant defense (By similarity).

{ECO:0000250}.