Anti-elastolytic activity of a honeybee (Apis cerana) chymotrypsin inhibitor

► AcCI is a honeybee (Apis cerana) chymotrypsin inhibitor. ► AcCI inhibits chymotrypsin, but not trypsin. ► AcCI inhibits human neutrophil elastase and porcine pancreatic elastase. ► AcCI does not inhibit factor Xa, thrombin, plasmin, or tissue plasminogen activator. ► AcCI acts as an anti-elastolytic factor.