Cancer Cell Cooperation (IMAGE) Johns Hopkins Medicine Caption Cooperation between oxygen-poor cancer cells (red) and oxygen-rich ones (green) is illustrated. Credit Laboratory of Kenneth Pienta, Johns Hopkins. Usage Restrictions With Credit. 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.