該基因編碼一種II型跨膜糖蛋白，是高度多態性的Kell血型抗原。kell糖蛋白通過一個二硫鍵連接到攜帶kx抗原的xk膜蛋白。編碼的蛋白質包含鋅內肽酶的尼泊爾素（m13）家族成員的序列和結構相似性。[由RefSeq提供，2008年7月]
This gene encodes a type II transmembrane glycoprotein that is the highly polymorphic Kell blood group antigen. The Kell glycoprotein links via a single disulfide bond to the XK membrane protein that carries the Kx antigen. The encoded protein contains sequence and structural similarity to members of the neprilysin (M13) family of zinc endopeptidases. [provided by RefSeq, Jul 2008]