Antibody Structure Diagram - Immune System Defense Mechanism #11378 (License: Personal Use)

This image depicts a simplified 3D model of an immunoglobulin G (IgG) antibody, with two identical antigen-binding fragments (Fab) at the tips of the 'Y' arms and a constant fragment (Fc) forming the stem. The blue gradient highlights structural symmetry and functional domains critical for pathogen recognition and immune activation.

Used in educational, medical, and biotech web pages explaining immunology, vaccine mechanisms, or monoclonal antibody therapies; targets students, researchers, and healthcare professionals seeking foundational visual understanding.