這個基因編碼一種通過刺激細胞凋亡來減少細胞生長的蛋白質。選擇性剪接和選擇性啟動子的使用導致編碼相同蛋白質的多個轉錄變體。這個基因在大腦中留下印記，在那里不同的轉錄變體從每個父母等位基因表達。上游啟動子起始的轉錄變異體優先從母體等位基因表達，而散布的NNAT基因（GeneID:4826）下游起始的轉錄變異體則從父系等位基因表達該位點的轉錄本也可能經過A-I編輯，導致蛋白質N-末端三個位置的氨基酸變化[由RefSeq提供，2015年11月]
This gene encodes a protein that reduces cell growth by stimulating apoptosis. Alternative splicing and the use of alternative promoters result in multiple transcript variants encoding the same protein. This gene is imprinted in brain where different transcript variants are expressed from each parental allele. Transcript variants initiating from the upstream promoter are expressed preferentially from the maternal allele, while transcript variants initiating downstream of the interspersed NNAT gene (GeneID:4826) are expressed from the paternal allele. Transcripts at this locus may also undergo A to I editing, resulting in amino acid changes at three positions in the N-terminus of the protein. [provided by RefSeq, Nov 2015]