Your blood type matters Unless you've recently given blood, you may not think much about your blood type. The presence or absence of certain molecules called A or B antigens, as well as a protein ...

Apart from antigen A and B, there's also the antigen D ... Specifically, this type of blood lacks any of the 61 Rh antigens.

There are four main blood types: O, A, B, and AB, each classified as positive or negative based on the Rh factor. Blood type is usually determined during hospital visits, especially when a ...

it is found on the surface of red blood cells and you are considered to have Rh-positive (Rh+) blood type. If you have no Rh antigen then you are considered to have Rh-negative (Rh-) blood type.

1949. The ABO MN and Rh blood groups of the Basque people. Amer J Phys Anthrop, ns, 7, 529–544. Chown, B, Peterson, R F, Lewis, Marion, and Hall, Ann. 1949. On the ABO gene and Rh chromosome ...