Science image (IMAGE) Salk Institute Caption Left: Hutchinson-Gilford progeria syndrome cell with signs of premature aging. This cell shows less histone protein (green), which normally helps maintain the cell’s DNA integrity and function. Right: The cell shows less signs of aging when LINE-1 RNA is reduced, and there is more histone protein present. Credit Salk Institute Usage Restrictions with credit and related coverage. License Original 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.