Breast Duct Cells (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption This tissue section from a normal mammary gland has been stained to show myoepithelial cells (red) and luminal epithelial cells (green). Credit Image from Mark LaBarge 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.