Description_x000D_ General description_x000D_ Chemical structure: peptide_x000D_ Biochem/physiol Actions_x000D_ Inhibitor of human leukocyte elastase and proteinase 3, originally isolated from the skin of patients with psoriasis. May protect against certain autoimmune tissue damage. An elastase inhibitor which is an active fragment of elafin, as well as elafin itself, can also be found in bronchial carcinoma secretions._x000D_ Exhibits co-existent antimicrobial and antiproteolytic activities.1 Inhibits WAP-type four-disulfide core (WFDC) domain containing elastases. Antimicrobial spectrum: Gram-positive and Gram-negative bacteria.