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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. 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- ).
Sep 15, 2023 · The ABO system has four major blood types: A, B, AB, and O. Blood types are further categorized by the presence (positive or +) or absence (negative or -) of the Rh (D) antigen on the surface of their red blood cells, also known as the Rh factor. This produces the eight major blood types. A and B antigens are sugars.
A blood type (also known as a blood group) is a classification of blood, based on the presence and absence of antibodies and inherited antigenic substances on the surface of red blood cells (RBCs). These antigens may be proteins, carbohydrates, glycoproteins, or glycolipids, depending on the blood group system.
May 28, 2024 · Blood group, classification of blood based on inherited differences in antigens on the surfaces of the red blood cells. The most well-known classification, the ABO blood group system, was developed by Austrian-born American biologist Karl Landsteiner in 1901.
Within the ABO system, there are four main groups - A, B, O, AB - determined by the presence or absence of A and B antigens on the surface of red blood cells.
There are four main blood types: A, B, AB and O. Blood bank specialists determine your blood type based on whether you have antigen A or B on your red blood cells. They also look for a protein called the Rh factor.
Jun 3, 2020 · Blood types depend on the content of the blood cells and are inherited from parents. There are eight main types. Which type you have affects how you can receive blood.
The ABO blood group antigens are attached to oligosaccharide chains that project above the RBC surface. These chains are attached to proteins and lipids that lie in the RBC membrane. Molecular basis: The ABO gene indirectly encodes the ABO blood group antigens. The ABO locus has three main allelic forms: A, B, and O.
Jun 19, 2023 · What is a blood group? Red blood cells (erythrocytes) have certain proteins on their surface, called antigens. Also, your plasma contains antibodies which will attack certain antigens if they are present. ABO and rhesus are both types of antigens found on the surface of red blood cells.
The ABO blood group is the most important blood group system in transfusion and organ transplantation medicine. The ABO antigens can be found on red cells, white cells, platelets and many circulating proteins and transfusion incompatibility can cause acute intravascular haemolysis, renal failure and death.
