該基因編碼的蛋白是一種質膜蛋白，催化胞外核苷酸轉化為膜滲透性核苷。編碼蛋白被用作淋巴細胞分化的決定因素。這種基因的缺陷會導致關節和動脈鈣化。兩個編碼不同亞型的轉錄變體已經被發現。
The protein encoded by this gene is a plasma membrane protein that catalyzes the conversion of extracellular nucleotides to membrane-permeable nucleosides. The encoded protein is used as a determinant of lymphocyte differentiation. Defects in this gene can lead to the calcification of joints and arteries. Two transcript variants encoding different isoforms have been found for this gene.