Proteinase Inhibitory Proteins, Secretory. Peptidase Inhibitory Peptides, Secretory . Peptidase Inhibitory Proteins, Secretory . Protease Inhibitory Peptides, Secretory . Protease Inhibitory Proteins, Secretory . Elastase Inhibitors, Neutrophil . Inhibitors, Neutrophil Elastase . Neutrophil Elastase Inhibitors . Proteinase Inhibitory Peptides, Secretory . Peptides and proteins found in BODILY SECRETIONS and BODY FLUIDS that are PROTEASE INHIBITORS. They play a role in INFLAMMATION, tissue repair and innate immunity (IMMUNITY, INNATE) by inhibiting endogenous proteinases such as those produced by LEUKOCYTES and exogenous proteases such as those produced by invading microorganisms. . 1.00