| molecular function | 
|---|
|  | GO:0030414 |  | peptidase inhibitor activity |  | Stops, prevents or reduces the activity of a peptidase, any enzyme that catalyzes the hydrolysis peptide bonds. | 
|  | GO:0019870 |  | potassium channel inhibitor activity |  | Stops, prevents, or reduces the activity of a potassium channel. | 
|  | GO:0005515 |  | protein binding |  | Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules). | 
|  | GO:0004867 |  | serine-type endopeptidase inhibitor activity |  | 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. | 
  | biological process | 
|---|
|  | GO:0010951 |  | negative regulation of endopeptidase activity |  | Any process that decreases the frequency, rate or extent of endopeptidase activity, the endohydrolysis of peptide bonds within proteins. | 
|  | GO:0010466 |  | negative regulation of peptidase activity |  | Any process that stops or reduces the rate of peptidase activity, the hydrolysis of peptide bonds within proteins. | 
|  | GO:0090331 |  | negative regulation of platelet aggregation |  | Any process that decreases the rate, frequency or extent of platelet aggregation. Platelet aggregation is the adhesion of one platelet to one or more other platelets via adhesion molecules. | 
|  | GO:0070495 |  | negative regulation of thrombin-activated receptor signaling pathway |  | Any process that stops, prevents, or reduces the frequency, rate or extent of thrombin-activated receptor protein signaling pathway activity. A thrombin receptor signaling pathway is the series of molecular signals generated as a consequence of a thrombin-activated receptor binding to one of its physiological ligands. | 
  | cellular component | 
|---|
|  | GO:0005576 |  | extracellular region |  | The space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers the host cell environment outside an intracellular parasite. |