Angiotensinogen is a serum globulin formed by the liver that is cleaved by renin to form angiotensin I. Angiotensinogen is also called angiotensin precursor.
Renin FRET Substrate I is a specific compound that functions as a substrate for human renin. It is specifically designed to contain the exact cleavage site found in the N-terminal peptide of humanangiotensinogen.