11.11: The Major Histocompatibility Complex (MHC) Last updated Jan 3, 2021 Save as PDF 11.10D: The Complement System 11.11A: MHC Polymorphism and Antigen Binding Page ID11809 ( \newcommand{\kernel}{\mathrm{null}\,}\) Topic hierarchy11.11A: MHC Polymorphism and Antigen BindingMHC molecules display a molecular fraction called an epitope and mediate interactions of leukocytes with other leukocytes or body cells.