?:definition
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Immunoassay reagents intended to perform qualitative and/or quantitative analyses of a sample of body fluids (e.g., serum) to determine the parathyroid hormone (PTH), the final product in the biosynthesis from a 115 amino acid peptide called pre-PTH. PTH is synthesized and secreted by the parathyroid glands; its secretion is primarily regulated by the level of free calcium in plasma or extracellular fluid.
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