Nucleoli Enlarged in Aging Cells (IMAGE) Salk Institute Caption Overactive protein synthesis found in premature aging disease may also play role in normal aging. Nucleoli in the cell nucleus, stained bright magenta and cyan against the purple backdrop of the nucleus, are enlarged in the progeria cell (right) compared to the normal cell (left). Credit Salk Institute Usage Restrictions with credit and related coverage. 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.