Misuse of Checkpoint by Cancer Cell (image) Netherlands Cancer Institute Share Print E-Mail Caption The T-cell receptor (orange) on the T-cell (left) binds a receptor on a cancer cell (right). The cancer cell blocks the T-cell's killing mechanism by binding the checkpoint (red) on the T-cell. Credit The Netherlands Cancer Institute Usage Restrictions The image may only be used with appropriate credit 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.