這個基因編碼一種參與嘧啶搶救的酶。編碼蛋白形成一個四聚體，分別催化胞苷和脫氧胞苷不可逆水解脫氨為尿苷和脫氧尿苷。它是維持細胞嘧啶池的幾種脫氨酶之一。該基因突變與用于治療某些兒童白血病的胞嘧啶核苷類似物阿糖胞苷敏感性降低有關。[由RefSeq提供，2008年7月]
This gene encodes an enzyme involved in pyrimidine salvaging. The encoded protein forms a homotetramer that catalyzes the irreversible hydrolytic deamination of cytidine and deoxycytidine to uridine and deoxyuridine, respectively. It is one of several deaminases responsible for maintaining the cellular pyrimidine pool. Mutations in this gene are associated with decreased sensitivity to the cytosine nucleoside analogue cytosine arabinoside used in the treatment of certain childhood leukemias. [provided by RefSeq, Jul 2008]