Carboxypeptidase A1 is an enzyme that in humans is encoded by the CPA1 gene. This protein functions as a digestive enzyme which is secreted (in inactive form) into pancreatic juice by the acinar cells of the pancreas.
Three different forms of human pancreatic procarboxypeptidase A have been isolated. The CPA1 and CPA2 forms are monomeric proteins with different biochemical properties. Carboxypeptidase A1 is a monomeric pancreatic exopeptidase. It is involved in zymogen inhibition.
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Further reading
External links The MEROPS online database for peptidases and their inhibitors: M14.001