該基因編碼激活的白細胞粘附分子（alcam），也稱為CD166（分化簇166），是免疫球蛋白受體的一個亞家族的成員，在細胞外區域有五個免疫球蛋白樣結構域（vvc2c2c2）。該蛋白與T細胞分化抗原CD6結合，參與細胞粘附和遷移過程。發現了編碼不同亞型的多種選擇性剪接轉錄變體。
This gene encodes activated leukocyte cell adhesion molecule (ALCAM), also known as CD166 (cluster of differentiation 166), which is a member of a subfamily of immunoglobulin receptors with five immunoglobulin-like domains (VVC2C2C2) in the extracellular domain. This protein binds to T-cell differentiation antigene CD6, and is implicated in the processes of cell adhesion and migration. Multiple alternatively spliced transcript variants encoding different isoforms have been found.