T Cells, UC San Diego School of Medicine (IMAGE) University of California - San Diego Caption CD8+ T cell undergoing asymmetric division to form two different daughter cells: a killer cell and a memory cell. Tubulin, a component of the cell's cytoskeleton, is shown in red and DNA is shown in blue. CD3 (green) is a molecule that helps to stimulate killer T cells, and here CD3 molecules are seen clustering on the side of the dividing cell that will give birth to a killer cell. Credit UC San Diego Health Usage Restrictions Use photo credit as indicated 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.