Magnetic Cells (image) University of North Carolina Health Care Caption A magnetized bead attaches to the exterior of a cell nucleus. The beads allow researchers to map out the signalling pathways that activate when physical forces push and pull on a cell. Credit UNC/Burridge Lab Usage Restrictions None 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.