該基因編碼脯氨酸和富含酸性（PAR）蛋白家族的成員，BZIP轉錄因子的一個子集。編碼的蛋白質與其他PAR家族成員形成同源二聚體或異源二聚體，并結合序列特異性啟動子元件以激活轉錄。染色體易位將該基因的一部分與e2a基因融合，導致兒童b系急性淋巴細胞白血病的一個子集。已經描述了選擇性剪接的轉錄變體，但其生物學有效性尚未確定。[由RefSeq提供，2008年7月]
This gene encodes a member of the proline and acidic-rich (PAR) protein family, a subset of the bZIP transcription factors. The encoded protein forms homodimers or heterodimers with other PAR family members and binds sequence-specific promoter elements to activate transcription. Chromosomal translocations fusing portions of this gene with the E2A gene cause a subset of childhood B-lineage acute lymphoid leukemias. Alternatively spliced transcript variants have been described, but their biological validity has not been determined. [provided by RefSeq, Jul 2008]