Antifibrinolytic and antimicrobial serine protease inhibitor. Inhibits trypsin, plasmin and microbial serine proteases but not chymotrypsin, thrombin and elastase. Inhibits the plasmin-mediated degradation of fibrin to fibrin degradation products. Also binds to bacterial and fungal surfaces and exhibits antimicrobial activity against fungi as well as Gram-positive and Gram-negative bacteria. Specifically expressed by the venom gland. Belongs to the serine protease inhibitor-like (TIL domain-containing) family.