Confocal Fluorescence Microscopy Image (IMAGE) University of Bristol Caption Confocal fluorescence microscopy image showing a cross-section of a host-guest nested protocell consisting of a captured guest proteinosome (green) trapped inside a host coacervate micro-droplet (red). Credit Professor Stephen Mann and Dr Nicolas Martin, University of Bristol. Usage Restrictions Single use only - for use with press release. Please do not archive. 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.