What are MHC molecules? What are human MHC molecules called? How were MHC molecules discovered, and what is their function? What are the differences between the antigens that are displayed by class I...

What are MHC molecules? What are human MHC molecules called? How were MHC molecules discovered, and what is their function? What are the differences between the antigens that are displayed by class I and class II MHC molecules? Describe the sequence of events by which class I and class II MHC molecules acquire antigens for display.