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DISCOVERY AND IDENTIFICATION OF FETUIN etuin was discovered in 1944 because of its behavior in the ultra F 1 centrifuge. In his historical review of fetuin, Kai Pedersen, the original discoverer of the protein, wrote, "it (fetuin) was quite different from other serum proteins previously studied. It precipitated abundantly in an ammonium sulphate concentration range in which earlier only 7s and 20s components had been observed. Its molecular weight, 50,000, was the lowest observed for a serum protein; it was very asym metrical; its partial specific volume was quite low-0. 70; the nitrogen...