Breast Cells with Stained p-16 (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption In these images of unirradiated and irradiated breast cells, nuclei have been dyed blue and tumor-suppressing p-16 proteins have been stained with a green fluorescent. The paucity of p-16 in the irradiated cells indicates the presence of a pre-cancerous vHMEC phenotype. Credit Image from Paul Yaswen, Berkeley Lab Usage Restrictions None 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.