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....

The Kell antigen system (also known as the Kell–Cellano system) is a human blood group system, that is, a group of antigens on the human red blood cell...

group systems is defined by the International Society of Blood Transfusion (ISBT) as systems in the human species where cell-surface antigens—in particular...

shows the bonding between the atoms Lewis acids and bases Lewis antigen system, a human blood group system Lewis number, a dimensionless number in fluid...

Ii antigen system is a human blood group system based upon a gene on chromosome 6 and consisting of the I antigen and the i antigen. The I antigen is...

Duffy antigen/chemokine receptor (DARC), also known as Fy glycoprotein (FY) or CD234 (Cluster of Differentiation 234), is a protein that in humans is...

Carbohydrate antigen 19-9 (CA19-9), also known as sialyl-LewisA, is a tetrasaccharide which is usually attached to O-glycans on the surface of cells....

The Diego antigen (or blood group) system is composed of 21 blood factors or antigens carried on the Band 3 glycoprotein, also known as Anion Exchanger...

humans there is an association between the blood group (Lewis antigen system, ABO blood group system and secretor status) and susceptibility to infection...

immune system include:[citation needed] Recognition of specific "non-self" antigens in the presence of "self", during the process of antigen presentation...

The ABO blood group system is used to denote the presence of one, both, or neither of the A and B antigens on erythrocytes (red blood cells). For human...

glycoproteins, or glycolipids, depending on the blood group system. Some of these antigens are also present on the surface of other types of cells of various...

but related antigen was discovered in a Mrs Yus for whom an antigen in this system is also named. In 1972 a numerical system for the antigens in this blood...

substance H), the antigen which is present in blood group O. As a result, they cannot make A antigen (also called substance A) or B antigen (substance B)...

Expression of the antigens in the Lewis blood group is also affected by secretor status: non-secretors cannot produce the Le(b) antigen.: 190  The expression...

In biology, chimeric antigen receptors (CARs)—also known as chimeric immunoreceptors, chimeric T cell receptors or artificial T cell receptors—are receptor...

immune system. Conversely, non-self molecules are those recognized as foreign molecules. One class of non-self molecules are called antigens (originally...

Sialyl LewisX (sLeX), also known as cluster of differentiation 15s (CD15s) or stage-specific embryonic antigen 1 (SSEA-1), is a tetrasaccharide carbohydrate...

the blood that "complements" the cells of the immune system. Ehrlich believed that each antigen-specific amboceptor has its own specific complement, whereas...

An epitope, also known as antigenic determinant, is the part of an antigen that is recognized by the immune system, specifically by antibodies, B cells...

protein involved in the intricate complement system, originating from the human leukocyte antigen (HLA) system. It serves a number of critical functions...

from the digestive system It transports white blood cells to and from the lymph nodes into the bones The lymph transports antigen-presenting cells, such...

Immunogenicity is the ability of a foreign substance, such as an antigen, to provoke an immune response in the body of a human or other animal. It may...

or plasma cell. In addition, B cells present antigens (they are also classified as professional antigen-presenting cells, APCs) and secrete cytokines...

that are predominantly IgG, such as those directed towards antigens of the Duffy and Kidd systems,: 198–200  generally do not cause immediate agglutination...

by specialized white blood cells activate the adaptive immune system through antigen presentation act as a physical and chemical barrier to infectious...

most variable region of the viral capsid is the P2 domain, which contains antigen-presenting sites and carbohydrate-receptor binding regions. Groups 1, 2...

work together to defend the body against cancer by targeting abnormal antigens expressed on the surface of tumor cells. Vaccine-induced immunity to COVID-19...

immune system) bridge the adaptive immune system with the innate immune system. Unlike conventional T cells that recognize protein peptide antigens presented...

Jean Lewis OC OM FRSC (born 1925 in Windsor, Ontario) is a Canadian medical researcher, known for her work on the Rh factor and on the Duffy antigen system...