Biology / Bio 3283 · Atom · ~20 seconds
Antibody Structure
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An antibody is a Y-shaped protein with variable regions that bind a specific antigen and constant regions that determine how the immune system handles the bound complex.
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The variable region's shape is unique to each antibody lineage, matching one specific antigen shape closely.
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The variable region provides specificity — the constant region determines antibody class and function, a separate property.