Autoimmunity

Step 4 of 7. T cells constantly patrol our body.

T-cells constanly patrol out bodies

T cells constantly patrol our bodies and scan for other cells that display ‘foreign’ peptides that indicate a cell is infected with a germ or has become cancerous.

In this way killer T-cells (also known as cytotoxic T lymphoctes or CTL) are able to see inside cells by scanning their surface with a molecule called the T-cell receptor.

If a foreign peptide is discovered killer T-cells eliminate the cell that displays it. In this way killer T-cells are able to eradicate cancer cells and cells that harbour germs.

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