3D Imaging (IMAGE) Johns Hopkins Medicine Caption Real-time 3D confocal time-lapse movie of Twist1-expressing epithelial cells (red) invading into the surrounding extracellular matrix and then being restrained and pulled back by normal myoepithelial cells (green). Credit Katarina Sirka 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.