So we have trypsin, we have chimetrypsin, we also have elastase. And these three are digestive enzymes found inside our small intestine which basically play the role of breaking down the proteins that we ingest. We also have cum proteases involved in the blood coagulation process and we'll discuss these in much more detail when we'll discuss the blood cascade. And so these are thrombin and plasmid. Now inside our immune system we have the complement system and one important serum protease, part of the complement system is known as the complement C one. And finally, serum proteases also play a role in reproduction.