該基因編碼一種在人體組織中分布多樣的Ⅰ型完整膜糖蛋白該蛋白的生理功能可能與其粘蛋白類型有關其他物種的同源蛋白被描述為分化抗原和流感病毒受體該蛋白的特異功能尚未確定，但已被認為是肺損傷的標志物。另外，還發現了編碼不同亞型的剪接轉錄變體。
This gene encodes a type-I integral membrane glycoprotein with diverse distribution in human tissues. The physiological function of this protein may be related to its mucin-type character. The homologous protein in other species has been described as a differentiation antigen and influenza-virus receptor. The specific function of this protein has not been determined but it has been proposed as a marker of lung injury. Alternatively spliced transcript variants encoding different isoforms have been identified.