Salmonella Within a Human Cell (image) Goethe University Frankfurt Caption This is Salmonella within a human cell, surrounded by a coat of different ubiquitin chains. Purple represents linear ubiquitin chains, green all ubiquitin chains. Visualized by super-resolution microscopy (dSTORM). Credit Mike Heilemann/Ivan Dikic Usage Restrictions None 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.