Dette enzym katalyseres i plasma, hvor vævomdannelsen af angiotensin I til den aktive vasokonstriktor angiotensin II samt nedbrydningen af den aktive vasodilatatorbradykin sker.
In plasma and tissue, this enzyme catalyses the conversion of angiotensin I to the active vasoconstrictor substance angiotensin II, as well as the breakdown of the active vasodilator bradykinin.