How your body generates billions of unique immune defenses
In short: The human immune system must recognize an almost infinite variety of pathogens. This video explains the molecular mechanisms that allow our bodies to create a diverse library of antibodies and T-cell receptors from a limited set of genes.
To achieve adaptive immunity, the body employs three primary mechanisms to ensure specificity in B-cell receptors (BCRs) and T-cell receptors (TCRs). These include gene rearrangement, which physically reshuffles genetic sequences; junctional diversity, which adds unique variations at the points where DNA segments join; and somatic hypermutation.
By mastering these molecular processes, one can understand how the body ensures it has a specific defense ready for nearly any antigen it encounters. The video serves as an educational deep dive into the mechanics of immune specificity.
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Sources
- Summary by Intellect · source: Immunology - Antibody (BCR) and TCR Diversity
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