If we looking at the table below, we’ll see that: Blood type A has A-antigens. The ABO blood groups are defined by the presence or absence of two inherited molecules, or antigens, A and B, that are present on the surface of red blood. The antigens that are present on the surface of our red blood cells determine our blood type. (This table has more entries than the table above but does not distinguish between Rh types. The ABO blood typing is a naming scheme that states the presence or absence of just two antigens: antigen A and antigen B. ( April 2012) ( Learn how and when to remove this template message)ĪBO and Rh blood type distribution by country & dependency (population averages)ĥ0.0% and above 40.0–49.9% 30.0–39.9% 20.0–29.9% 10.0–19.9% 5.0–9.9% Ethnic distribution of ABO (without Rh) blood types In addition to the A and B antigens, there is a protein called the Rh factor, which can be either present (+) or absent (), creating the 8 most common blood types ( A+, A-, B+, B-, O+, O-, AB+, AB- ).
Please help to ensure that disputed statements are reliably sourced. There are four major blood groups determined by the presence or absence of two antigens, A and B, on the surface of red blood cells. Relevant discussion may be found on Talk:Blood type distribution by country. Blood type O is associated with high death rates in severe trauma patients, according to a study published in the open access journal Critical Care that. This section's factual accuracy is disputed. The blood group A and B enzymes act on the same acceptor substrates but differ in their binding to nucleotide sugar donors.