Blood Group Systems The term Blood Group refers to the individual's Red cell surface antigens. These antigens are mainly Glycoproteins or glycolipids that form in RBC membranes. The International Society of Blood Transfusion (ISBT) working Party for Red Cell immunogenetics groups has maintained the records of RBC antigens as follows: 1. Blood Group Systems 2. Collections (201 Series) 3. Low prevalence Antigens (700 Series) 4. High Prevalence Antigens (901 Series) 1. Blood Group Systems: Blood group systems are defined as systems of one or more antigens governed by a single gene or complex of two or more closely linked homologous genes. In order for a blood group system and its antigens to be recognized the underlying genetic variation must be identified, sequenced, and confirmed to affect phenotype. Currently, 44 recogn...
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