Antibody Structure Visualization - Immune System Defense Mechanism #3894622 (License: Personal Use)

This high-resolution 3D illustration depicts immunoglobulin G (IgG) antibodies, showcasing their characteristic Y-shaped quaternary structure composed of two heavy and two light polypeptide chains. The colorful domains represent functional regions: Fab (antigen-binding fragments) at the tips and Fc (crystallizable fragment) at the stem, essential for effector functions like phagocytosis and complement activation. The image uses transparent surface rendering to reveal internal folding and glycosylation sites.

Used in immunology educational resources, biomedical research websites, vaccine development pages, and pharmaceutical marketing materials to explain adaptive immunity and monoclonal antibody therapeutics. Matches user intent for understanding antibody function, structure, or applications in diagnostics and treatment.