A blue copper containing dehydrogenase protein (135 kD) found in serum (200-500 g/mL) that is apparently involved in copper detoxification and storage and possibly also in mopping up excess oxygen radicals or superoxide anions.

a blood protein which binds and transports most of the copper in the body.

Ceruloplasmin (or caeruloplasmin) is officially known as ferroxidase or iron(II):oxygen oxidoreductase. It is an enzyme synthesized in the liver containing 8 atoms of copper in its structure. Although it is often considered a copper transport protein, this is not its primary function, just as hemoglobin is not a carrier of iron, although it contains iron.