该基因编码的蛋白是一种催化甲基胞嘧啶转化为5-羟甲基胞嘧啶的甲基胞嘧啶双加氧酶。编码蛋白参与骨髓生成，该基因的缺陷与数种骨髓增生性疾病有关。该基因有两个编码不同亚型的变体。
The protein encoded by this gene is a methylcytosine dioxygenase that catalyzes the conversion of methylcytosine to 5-hydroxymethylcytosine. The encoded protein is involved in myelopoiesis, and defects in this gene have been associated with several myeloproliferative disorders. Two variants encoding different isoforms have been found for this gene.