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Medical Term:


Pronunciation: i'so-an'ti-jen


  1. An antigenic substance that occurs only in some individuals of a species, such as the blood group antigens of humans. For specific isoantigens of blood groups, see the Blood Groups Appendix.
  2. Sometimes used as a synonym of alloantigen.
© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.