Atlas One · Host Biology · Scale 03 — Molecular

Antibody

Y-shaped glycoproteins secreted by plasma cells; two heavy + two light chains. Variable domains (VH/VL) confer antigen specificity; constant domains determine isotype (IgG, IgA, IgM, IgE, IgD) and effector functions (neutralization, opsonization, complement activation, ADCC).

Also known as: immunoglobulin, Ig, antibody, Ab, gamma-globulin

Scale 03 — MolecularScale
draftStatus
2026-06-06Last Reviewed
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antibody

Antibody

Y-shaped glycoproteins secreted by plasma cells; two heavy + two light chains. Variable domains (VH/VL) confer antigen specificity; constant domains determine isotype (IgG, IgA, IgM, IgE, IgD) and effector functions (neutralization, opsonization, complement activation, ADCC).