The ABO blood group system is used to denote the presence of one, both, or neither of the A and B antigens on erythrocytes.
In immunology, an antigen is a molecule capable of inducing an immune response (to produce an antibody) in the host organism.
Chromosome 19 is one of the 23 pairs of chromosomes in humans.
A flagellum (plural: flagella) is a lash-like appendage that protrudes from the cell body of certain bacterial and eukaryotic cells.
H-Y antigen is a male tissue specific antigen.
The h/h blood group, also known as Oh or the Bombay blood group, is a rare blood type.
Histocompatibility, or tissue compatibility, is the property of having the same, or sufficiently similar, alleles of a set of genes called human leukocyte antigens (HLA), the human version of the major histocompatibility complex (MHC).
The major histocompatibility complex (MHC) is a set of cell surface proteins essential for the acquired immune system to recognize foreign molecules in vertebrates, which in turn determines histocompatibility.
Peptides (from Gr.: πεπτός, peptós "digested"; derived from πέσσειν, péssein "to digest") are short chains of amino acid monomers linked by peptide (amide) bonds.
A T cell, or T lymphocyte, is a type of lymphocyte (a subtype of white blood cell) that plays a central role in cell-mediated immunity.
Transplant rejection occurs when transplanted tissue is rejected by the recipient's immune system, which destroys the transplanted tissue.