Human Colon Cancers Contain Two Populations of Cancer Cells (image) Rockefeller University Press Share Print E-Mail Caption Human colon cancers contain two populations of cancer cells, one at the tumor edge in which the MAPK pathway is highly active (indicated by green staining and the white arrowhead), and one in the center of tumor in which the NOTCH pathway is activated (indicated by red staining and the white arrow). Credit Schmidt et al., 2018 Usage Restrictions Reporters may freely use these materials in news coverage with the appropriate credit information. 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.