Aminopeptidase A (APA, ENPEP) hydrolyzes the N-terminal amino acid of angiotensin-(1-8) (angiotensin II) to yield angiotensin-(2-8) (angiotensin III) (Goto et al. 2006). The catalysis is more specific and efficient in the presence of calcium ions (Goto et al. 2006).
Tsujimoto, M, Ishii, Y, Goto, Y, Hattori, A, Mizutani, S
metallopeptidase activity of ENPEP Dimer [plasma membrane]
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