該基因編碼一種抗凋亡蛋白，屬于bcl-2家族。選擇性剪接導致多個轉錄變體。最長的基因產物（亞型1）通過抑制細胞凋亡來增強細胞存活，而交替剪接的較短的基因產物（亞型2和亞型3）則促進細胞凋亡并誘導死亡。[由RefSeq提供，2010年10月]
This gene encodes an anti-apoptotic protein, which is a member of the Bcl-2 family. Alternative splicing results in multiple transcript variants. The longest gene product (isoform 1) enhances cell survival by inhibiting apoptosis while the alternatively spliced shorter gene products (isoform 2 and isoform 3) promote apoptosis and are death-inducing. [provided by RefSeq, Oct 2010]