Protein Aggregate Tracks (IMAGE) Stowers Institute for Medical Research Caption The movements of protein aggregates found in old yeast cells follow a "random walk" pattern. Credit Chuankai Zhou, Stowers Institute for Medical Research Usage Restrictions For one time use only 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.