Antigen
References:
1-What is the Difference Between Exogenous and Endogenous Antigens:
-https://pediaa.com/what-is-the-differ...
2- Antigens and Epitopes:
-bio.libretexts.org/Bookshelves/Microbiology/Book%3A_
Microbiology_(Kaiser)/Unit_6%3A_Adaptive_Immunity/12%3A_Introduction_to_Adaptive_Immunity/12.2%3A_Antigens_and_Epitopes
3-Antigen:
https://www.britannica.com/science/an...
4-Antigen- Properties, Types and Determinants of Antigenicity :
https://microbiologyinfo.com/antigen-...