Proteases are a broad class of enzymes that function to cut proteins into smaller peptide fragments through the hydrolytic cleavage of peptide bonds. Equally diverse are protease inhibitors, which consist of proteins, peptides, or small molecules that inhibit the activity of proteases. Protease inhibitors can be classified by the type of protease inhibited, such as cysteine proteases, serine proteases, aspartic proteases, and metalloproteases. PMSF and AEBSF, for example, are serine protease inhibitors. Other inhibitors are broad-acting, such as Leupeptin, which inhibits cysteine, serine, and threonine peptidases. More specific proteases, such as those that target viruses like HIV, have clinical applications. Browse the protease inhibitor reagents below from different sources and visit the supplier page for more information.