autoantigen
noun
au·to·an·ti·gen
ˌȯt-(ˌ)ō-ˈant-i-ˌjen 
: an antigen that is a normal bodily constituent and against which the immune system produces autoantibodies
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“Autoantigen.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/autoantigen. Accessed 23 Dec. 2024.
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