Ad
related to: red blood cell surface antigen
Search results
Results From The WOW.Com Content Network
These antigens are almost universally present on human red cells, but their absence has been noted in some individuals and some have been associated with transfusion reactions or other problems. Finding compatible units for transfusion to a patient that lacks one of these antigens is a major challenge and some countries maintain rare donor ...
The Er blood group system consists of five human red blood cell surface antigens, Er a, Er b, Er3, Er4 and Er5. [1] The incidences of Er a and Er3 are each greater than 99% of the human population, while the incidence of Er b is less than 0.01%. [2] [3] Er4 and Er5 are found at a high frequency in the general population. [1]
Hemolytic comes from two words: "hema" (blood) and "lysis" (solution) or breaking down of red blood cells; Erythroblastosis refers to the making of immature red blood cells; Fetalis refers to the fetus. When the condition is caused by the Rh D antigen-antibody incompatibility, it is called Rh D Hemolytic disease of the newborn or Rh disease.
Blood types are defined according to the presence or absence of specific antigens on the surface of red blood cells. The most important of these in medicine are the ABO and RhD antigens [7]: 585 but many other blood group systems exist and may be clinically relevant in some situations. As of 2021, 43 blood groups are officially recognized.
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.
Agglutinogen is an antigen [1] that causes the formation of agglutinins in the body and leads to agglutination, such as hemagglutination, which involves red blood cells (RBCs). The kind of agglutinogens present on the red blood cells helps determine the blood type of a person. [2]
The term human blood group systems is defined by the International Society of Blood Transfusion (ISBT) as systems in the human species where cell-surface antigens—in particular, those on blood cells—are "controlled at a single gene locus or by two or more very closely linked homologous genes with little or no observable recombination between them", [1] and include the common ABO and Rh ...
The cis-AB phenotype has a single enzyme that creates both A and B antigens. The resulting red blood cells do not usually express A or B antigen at the same level that would be expected on common group A 1 or B red blood cells, which can help solve the problem of an apparently genetically impossible blood group. [33]