The binding of prorenin to the (pro)renin receptor activates the protease activity of prorenin, which can then hydrolyze angiotensinogen to yield angiotensin-(1-10) (angiotensin I) (Nguyen et al. 2002). Prorenin is inactive when not bound to the (pro)renin receptor. Aliskiren, a drug used clinically to treat hypertension, inhibits the cleavage of angiotensinogen by renin (Gossas et al. 2011, Wood et al. 2003, reviewed in Gerc et al. 2009).