Neutrophil Elastase, Bone marrow serine protease, Elastase-2, Human leukocyte elastase, HLE, Medullasin, PMN elastase, ELANE/ELA2, chymotrypsin, Neutrophil Elastase, substrate specificity, bacteria, neutrophil, inflammatory disease, idiopathic pulmonary fibrosis, rheumatoid arthritis, adult respiratory distress syndrome, cystic fibrosis, cytoplasm, granule, cyclic neutropenia, congential neutropenia diseases, infections. hydrolase, protease, Zymogen, calcium ion, chemotaxis, interleukin-8, Interleukin-8, UV response, secretory granule, heparin binding, and endopeptidase activity