The<unk>  (also known as<unk> –Cellano system) is a human blood group system, that is, group of antigens on the human red blood cell surface which are important determinants of blood type and are targets for autoimmune or alloimmune diseases which destroy red blood cells. The<unk>  antigens are K, k, Kpa, Kpb, Jsa and Jsb. The<unk>  antigens are peptides found within the<unk>  protein, a 93-kilodalton transmembrane zinc-dependent endopeptidase which is responsible for cleaving endothelin-3.
Kell antigen system
MNS antigen system
Lewis antigen system
Yt antigen system
Lutheran antigen system
Colton antigen system
Kidd antigen system
Ii antigen system