Enables carboxypeptidase activity. Predicted to be involved in bradykinin catabolic process; protein processing; and response to glucocorticoid. Predicted to be located in extracellular region. Predicted to be active in extracellular space. Is expressed in several structures, including gonad; gut; liver; neural tube; and yolk sac. Human ortholog(s) of this gene implicated in carboxypeptidase N deficiency. Orthologous to human CPN1 (carboxypeptidase N subunit 1). [provided by Alliance of Genome Resources, Apr 2022]