Anti-alpha1-Antitrypsin (human plasma) (AAT, alpha-1-AT, alpha1 Proteinase Inhibitor, alpha1 PI)

Protein function: Inhibitor of serine proteases. Its primary target is elastase, but it also has a moderate affinity for plasmin and thrombin. Irreversibly inhibits trypsin, chymotrypsin and plasminogen activator. The aberrant form inhibits insulin-induced NO synthesis in platelets, decreases coagulation time and has proteolytic activity against insulin and plasmin. [The UniProt Consortium]