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Blood type AB means you have both A and B antigens. A antigen is a sugar called N-acetyl galactosamine, added to fucose present on a red cell membrane glycoprotein. B antigen â¦ is a sugar called D-galactosamine, also added to fucose.
<br /><br /> So if a person with type A blood is injected with type B blood, the body of that person will attack the type-B blood cells. <br /><br /> A person with AB positive blood is a universal receiver, because they already produce all of the normal antigens present on red blood cells. So a AB+ person's body will not attack red blood cells that carry some, all, or none of the antigens.