<prompt> Serine proteasesHydrolyze peptide bonds involving carboxyl groups of serine residuesAre characterized by having several active sites per molecule, each containing a serine residueAre inactivated by reaching with one molecule of di-isopropyl-fluorophosphate per molecule of proteinAre exopeptidases  <response>: It is otherwise called alpha-anti-proteinase or protease inhibitor. It inhibits all serine proteases proteolytic enzymes having a serine at their active center, such as plasmin, thrombin, trypsin, chymotrypsin, elastase, and cathepsin. Serine protease inhibitors are abbreted as Serpins. They are enzymes with a serine residue at the active site and most of the proteolytic enzymes belong to this group, e.g. trypsin, chymotrypsin, clotting factors Serine proteases examples-Trypsin, Chymotrypsin,Clotting factorsRef: DM Vasudevan, Page no: 44 