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  2. Lewis antigen system - Wikipedia

    en.wikipedia.org/wiki/Lewis_antigen_system

    The Lewis antigen system is a human blood group system. It is based upon two genes on chromosome 19: FUT3, or Lewis gene; and FUT2, or Secretor gene. Both genes are ...

  3. Human blood group systems - Wikipedia

    en.wikipedia.org/wiki/Human_blood_group_systems

    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 ...

  4. Secretor status - Wikipedia

    en.wikipedia.org/wiki/Secretor_status

    Because non-secretors cannot form H antigen in body fluids, they cannot express soluble ABO antigens. [1]: 124–6 Lewis blood group phenotypes are controlled by the FUT3 or Le gene and the Se gene. There are two major antigens in the Lewis system: Le(a) and Le(b). Individuals who are negative for Le express neither antigen and their blood type ...

  5. CA19-9 - Wikipedia

    en.wikipedia.org/wiki/CA19-9

    Carbohydrate antigen 19-9 (CA19-9), also known as sialyl-Lewis A, is a tetrasaccharide which is usually attached to O-glycans on the surface of cells. It is known to play a role in cell-to-cell recognition processes. It is also a tumor marker used primarily in the management of pancreatic cancer. [1]

  6. Category:Blood antigen systems - Wikipedia

    en.wikipedia.org/wiki/Category:Blood_antigen_systems

    Colton antigen system; Complement component 4; Complement receptor 1; D. Decay-accelerating factor; ... Lewis antigen system; LU domain; Lutheran antigen system; M.

  7. Blood compatibility testing - Wikipedia

    en.wikipedia.org/wiki/Blood_compatibility_testing

    Blood compatibility testing is routinely performed before a blood transfusion.The full compatibility testing process involves ABO and RhD (Rh factor) typing; screening for antibodies against other blood group systems; and crossmatching, which involves testing the recipient's blood plasma against the donor's red blood cells as a final check for incompatibility.

  8. Fucosyltransferase 3 - Wikipedia

    en.wikipedia.org/wiki/Fucosyltransferase_3

    This gene is a member of the fucosyltransferase family, which catalyzes the addition of fucose to precursor polysaccharides during the final step of Lewis antigen biosynthesis. It encodes an enzyme with both alpha(1,3)-fucosyltransferase and alpha(1,4)-fucosyltransferase activities.

  9. ICAM4 - Wikipedia

    en.wikipedia.org/wiki/ICAM4

    The LW blood system was first described by Landsteiner and Wiener in 1940. [1] It was often confused with the Rh system, not becoming a separate antigen system until 1982. The LW and RhD antigens are genetically independent though they are phenotypically related and the LW antigen is expressed more strongly on RhD positive cells than on RhD negative cells.