Assembly Steps (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption After cell types labeled with red and green dye markers are joined (bottom), the resulting 3-D structures are purified to eliminate unreacted cells (center). More cells can then be added to form even more complex structures (top). There is no theoretical limit to the number of different cell types that can be assembled; microtissues with three or four different kinds of cells should be feasible. Credit Carolyn Bertozzi, Lawrence Berkeley National Laboratory Usage Restrictions with credit as above 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.