"isoantigen." YourDictionary, n.d. Web. 11 October 2018. <http://www.yourdictionary.com/isoantigen>.
isoantigen. (n.d.). Retrieved October 11th, 2018, from http://www.yourdictionary.com/isoantigen
A protein or other substance, such as histocompatibility or red blood cell antigens, that is present in only some members of a species and therefore able to stimulate isoantibody production in other members of the same species who lack it. Also called alloantigen .