Recombinant human Angiotensin Converting Enzyme (ACE) is expressed in human HEK 293 cells as a glycoprotein with a calculated molecular mass of 138 kDa (amino acids 30-1232). The DTT-reduced protein migrates as a 180 kDa polypeptide on SDS-PAGE due to glycosylation. This protein is manufactured in human cells, with no serum. The human cells expression system allows human-like glycosylation and folding, and often supports higher specific activity of the protein. The protein is produced with no artificial tags.

The ACE gene codes for angiotensin-converting enzyme, which is one of the major enzymes in the RAS (renin angiotensin system). The ACE gene is localized on human chromosome 17q23.