A cell chops up a pathogen and displays the fragments on its surface bound to a special protein. That protein is the:

1. Fragments must be shown to T cells to be recognised. 2. A dedicated presenting protein carries them to the surface. 3. That protein is the major histocompatibility complex molecule. _Source: OpenStax Anatomy and Physiology 2e, Chapter 21, The Lymphatic and Immune System._