Antibody Molecule (IMAGE) Garvan Institute of Medical Research Caption This is the structure of the human antibody molecule with heavy chain in blue and light chain in red (IgG isotype shown). Credit Garvan Institute of Medical Research / Centre for Targeted Therapy Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.