EOG8BGCCQ GO:0004867 12/15 serine-type endopeptidase inhibitor activity molecular_function "Stops, prevents or reduces the activity of serine-type endopeptidases, enzymes that catalyze the hydrolysis of nonterminal peptide bonds in a polypeptide chain; a serine residue (and a histidine residue) are at the active center of the enzyme." [GOC:ai]