Fragile telomeres (IMAGE) University of Pittsburgh Caption X-shaped chromosomes are stained purple, and telomeres appear as green spots at chromosome tips. When researchers used a novel tool to induce oxidative damage specifically at telomeres, they can become fragile (green arrows), sending cells into senescence. The inset shows an enlarged chromosome with fragile telomeres, indicated by multiple green spots at chromosome tips. Credit Barnes et al., Nature Structural & Molecular Biology, 10.1038/s41594-022-00790-y (2022) Usage Restrictions For use with embargoed release. 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.