any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions

any enzyme that breaks down polymeric macromolecules into their smaller building blocks, in order to facilitate their absorption by the body.

an enzyme that catalyzes the hydrolysis of a chemical bond.

any of a group of proteases that mediate apoptosis

proteolytic enzyme that converts angiotensin I into angiotensin II

protease produced in the kidney that converts plasminogen to plasmin and so initiates fibrinolysis

a proteolytic enzyme secreted by the kidneys; catalyzes the formation of angiotensin and thus affects blood pressure

a broad-spectrum serine protease, able to digest keratin.