A blue, copper-containing α-globulin of blood plasma, with a molecular weight of about 122,000 and 6 or 7 atoms of copper per molecule; involved in copper transport and regulation, and can reduce O2 directly without known intermediates; has ferroxidase and polyamine oxidase activities. Ceruloplasmin is absent in congenital Wilson disease.
[L. caeruleus, dark blue]
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Examples: glitazone, GI cocktail, etc.