Isolation and partial characterization of molecular forms of ceruloplasmin from human bile

Highly purified ceruloplasmin (CP) was isolated from human bile using affinity chromatography. Billiary CP is represented by two molecular species. One of those is identical to oxidase CP from normal human serum while the other is analogous to oxidase-lacking CP specific for the serum of the carriers of Wilson's mutation with respect to immunological specificity, electrophoretical mobility and molecular mass of the large fragments from spontaneous proteolysis.