A New Structure in the Immune System (image) Garvan Institute of Medical Research Share Print E-Mail Caption Immune cells (pink and green) gathering at the subcapsular proliferative locus (SPF), a newly discovered immune system structure that appears in the lymph node. Blue = surface of the lymph node. Credit Imogen Moran & Tri Phan/Garvan Institute Usage Restrictions None Share Print E-Mail 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.