The MHC's primary role is to display antigens (fragments of pathogens) on the surface of cells, enabling immune cells to recognize and respond to foreign invaders.

MHC class I molecules present antigens to CD8+ T cells, which are cytotoxic T cells responsible for killing infected or cancerous cells.

MHC class II molecules are mainly expressed on antigen-presenting cells (APCs), such as macrophages, dendritic cells, and B cells, which capture and process antigens for presentation to CD4+ T cells.

CD4+ T cells, also known as helper T cells, play a crucial role in activating other immune cells, such as CD8+ T cells and B cells, by releasing cytokines and promoting immune responses.

MHC class II molecules present antigens to CD4+ T cells, which are helper T cells responsible for activating other immune cells and coordinating immune responses.

The peptide-binding groove is the region of an MHC molecule that binds to and holds the antigen peptide for presentation to immune cells.

MHC class I molecules present antigens to natural killer (NK) cells, which are cytotoxic lymphocytes responsible for killing infected or cancerous cells.

Antigen presentation is the process by which MHC molecules bind to and display antigens on the cell surface, enabling immune cells to recognize and respond to foreign invaders.

MHC class I molecules present antigens to cytotoxic T cells, which are responsible for killing infected or cancerous cells.

MHC molecules play a crucial role in transplant rejection by triggering an immune response against foreign organs, recognizing the foreign MHC molecules as non-self and initiating an attack.

MHC class II molecules present antigens to helper T cells, which are responsible for activating other immune cells and coordinating immune responses.

MHC molecules play a role in triggering autoimmune diseases by presenting self-antigens to immune cells, leading to an immune response against the body's own tissues.

MHC class II molecules present antigens to B cells, which are responsible for producing antibodies and initiating humoral immune responses.

MHC molecules play a crucial role in regulating the immune response to viral infections by presenting viral antigens to immune cells, enabling the immune system to recognize and target the virus.

MHC class II molecules present antigens to macrophages, which are phagocytic cells responsible for engulfing and destroying foreign particles.