Terasaki Spiral (IMAGE) University of California - Santa Barbara Caption Artist's rendering of Terasaki spiral ramps, helices that connect stacks of evenly spaced sheets in the rough endoplasmic reticulum. Credit Jemal Guven 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.