Procalcitonin is a peptide hormone mainly produced by the C cells of the thyroid and certain endocrine cells of the lung. Under normal expression conditions, procalcitonin is immediately cleaved into three specific fragments, an N terminal residue, calcitonin and katacalcin. Levels of unprocessed Procalcitonin rise significantly after bacterial infection, trauma or shock. Recombinant Human Procalcitonin produced in E.coli is a single, non-glycosylated, polypeptide chain containing 116 amino acids with a molecular weight of 12,796 Daltons. MW: 13. 2 kDa. Purity ≥97%