ACE/CD143 Protein, Human (His) is a recombinant human Angiotensin-converting enzyme/CD143 a His tag at the C-terminus. Angiotensin I-converting enzyme (ACE, CD143) hydrolyzes small peptides such as angiotensin I, bradykinin, substance P, LH-RH and several others and thus plays a key role in blood pressure regulation and vascular remodeling. ACE plays a crucial role in blood pressure regulation, vascular remodeling, and immunity[1].