這個基因編碼的蛋白質是一個DNA結合，亮氨酸拉鏈包含轉錄因子，作為同二聚體或異二聚體。根據結合位點和結合伙伴，編碼的蛋白質可以是轉錄激活物或阻遏物。這種蛋白在一些細胞過程中起調節作用，包括胚胎晶狀體纖維細胞的發育，增加t細胞對凋亡的敏感性，以及軟骨細胞的終末分化。該基因缺陷是幼年性粉狀白內障和先天性化膿性白內障4（cca4）的病因之一。已經發現了兩個編碼不同亞型的轉錄變體。[由RefSeq提供，2010年1月]
The protein encoded by this gene is a DNA-binding, leucine zipper-containing transcription factor that acts as a homodimer or as a heterodimer. Depending on the binding site and binding partner, the encoded protein can be a transcriptional activator or repressor. This protein plays a role in the regulation of several cellular processes, including embryonic lens fiber cell development, increased T-cell susceptibility to apoptosis, and chondrocyte terminal differentiation. Defects in this gene are a cause of juvenile-onset pulverulent cataract as well as congenital cerulean cataract 4 (CCA4). Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jan 2010]