Biology / Unit 13 Bio 3281 short lesson, about 20 seconds
MHC Class I and II Antigen Presentation
Captions available
The idea
MHC class I, on nearly all cells, displays internal protein fragments for cytotoxic T cells; MHC class II, on specialized cells, displays engulfed fragments for helper T cells.
In practice
A virus-infected cell's MHC class I display flags it for cytotoxic attention.
Where people slip
MHC class I and II serve different cells and T cell types, not interchangeable versions of one system.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
Something wrong in this lesson? Flag it · Sources for Biology