In-cell assembly process of H1-Fr/PhC (IMAGE) Tokyo Institute of Technology Caption This diagram shows how H1-Fr monomers and polyhedrin monomers (PhMs) combine to spontaneously form a complex core–shell structure inside the E. coli bacteria Credit Nano Letters 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.