But no means that we cannot mix these two blood types because Agglutination will take place, an antibody will bind to an antigen, clumping will take place. And so our blood will be rejected. So let's begin with A. Let's suppose our individual that is receiving that blood has blood type A. And what that means is it contains antigen A on the red blood cells and it produces antibodies against antigen B. And so what that means is if a person, if the donating person has the same blood type A, then that means that person also has these red blood cells with the same type of antigen A.