noun
- An antigen that occurs in some individuals of a species but not in others, capable of inducing an immune response in those lacking it.
Usage: medical; immunology; also called alloantigen
Examples
- Blood group antigens are isoantigens that differ among individuals in the human population.
- The patient's immune system reacted to the isoantigen present on the donor's cells.
- Isoantigens on red blood cells determine blood type compatibility for transfusions.
- Researchers studied how isoantigens trigger rejection responses in organ transplantation.
- The presence of specific isoantigens can affect pregnancy outcomes in certain cases.