Enables cytidine deaminase activity and identical protein binding activity. Involved in UMP salvage. Is active in cytosol. Is expressed in several structures, including alimentary system; eye; genitourinary system; heart; and nervous system. Human ortholog(s) of this gene implicated in lung non-small cell carcinoma. Orthologous to human CDA (cytidine deaminase). [provided by Alliance of Genome Resources, Apr 2022]