MOLEKUUL / SCIENCE PHOTO LIBRARY MOLEKUUL / SCIENCE PHOTO LIBRARY
Antibody molecule. Crystal structure of a monoclonal immunoglobulin (IgG2a). IgG antibodies are composed of 2 long heavy chains and 2 shorter light chains. This antibody adopts a T-shape: the arms of the T make up the Fab or antigen binding region, while the base part or Fc region plays a role in interacting with the immune system. Atoms are represented as spheres; the light chains are shown in blue while the heavy chains are green shaded.
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