A Changing View of Bone Marrow Cells (image) California Institute of Technology Caption Caltech researchers separate blood stem cells from other bone marrow cells and load them onto a newly developed microfluidic chip. Fluorescent signals indicate the presence of secreted proteins with one "barcode" representing each cell. Credit Caltech/James Heath/Chao Ma/Young Shik Shin 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.