他名称X Kell blood group precursor-related, Y-linked 2; X Kell blood group precursor-related, Y-linked pseudogene 7; X-linked Kx blood group related, Y-linked 2; XK related, Y-linked 2; XK, Kell blood group complex subunit-related, Y-linked 2; testis-specific XK-related protein, Y-linked 2