Characterization of immunoreactive forms of human osteocalcin generated in vivo and in vitro

Abstract excerpt

Three monoclonal antibodies recognizing the 5-13, 25-37, and 43-49 sequence of the human osteocalcin were used in competitive and two-site radioimmunoassays (RIA) to characterize specifically various immunoreactive forms of circulating human osteocalcin. The intact molecule accounts for 36% of total in normals (2.6 nM), 46% in patients with osteoporosis (3.1 nM), and 26% in chronic renal failure (6.9 nM). Four...

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