Breast Cancer Cell (IMAGE) University of California - San Diego Caption A breast cancer cell captured in the process of division, with tubulin (a structural protein) in red; mitochondria in green; and chromosomes in blue. Credit Wei Qian\National Cancer Institute Usage Restrictions No restrictions. License Public Domain 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.