Protocell (IMAGE) U.S. National Science Foundation Caption Above is a 3-D view of a model protocell approximately 100 nanometers in diameter. Credit Janet Iwasa, Szostak Laboratory, Harvard Medical School and Massachusetts General Hospital 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.