(IMAGE) Johannes Gutenberg Universitaet Mainz Caption Artificial organelles within a cell can be constructed to assume certain functions, such as protein synthesis. Thus, it has become practicable to assemble a system that can undertake essential cellular functions. Credit ill./©: Nike Heinss Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.