Biology / Bio 3275 · Atom · ~20 seconds
Antigen Specificity and Receptor Diversity
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Adaptive immune cells carry receptors generated through genetic recombination to recognize one antigen shape each, together giving the population an enormous recognition range.
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Only the small lymphocyte subset whose receptor matches an invading antigen gets activated during infection.
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Receptor diversity forms before any infection — the body does not custom-build a receptor for a specific threat.