Migrating Cell (IMAGE) University of Basel Caption The cell stimulated with the growth factor PDGF (upper cell) migrates targeted in only one direction on its track, while the not stimulated cell (lower cell) changes its direction of movement periodically and migrates approximately five times slower. Credit University of Basel, Department of Biomedicine 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.