Description_x000D_ General description_x000D_ Proteinase 3 is found in high concentration in the primary granules of myeloid leukemia blasts.4_x000D_ Application_x000D_ Proteinase 3 has been shown to be important in the pathogenesis of human emphysema.1 It has also been used in a study to investigate the liberation of the antibacterial and cytotoxic peptide LL-37 by cleavage of human cathelicidin hCAP-183.2_x000D_ Biochem/physiol Actions_x000D_ Proteinase 3 (PR-3) is a serine protease expressed in the granules of neutrophils and monocytes. Also known as myeloblastin and p29b, it degrades elastin and is associated with myeloid leukemia and Wegener′s granulomatosis.3_x000D_ Used for the detection of anti-PR3 auto-antibodies in immunoassays._x000D_ Physical form_x000D_ Solution in 50 mM sodium acetate (pH 5) with 600 mM sodium chloride