該基因編碼的蛋白是一種催化甲基胞嘧啶轉化為5-羥甲基胞嘧啶的甲基胞嘧啶雙加氧酶。編碼蛋白參與骨髓生成，該基因的缺陷與數種骨髓增生性疾病有關。該基因有兩個編碼不同亞型的變體。
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.