Impaired Muscle Regeneration (IMAGE) European Molecular Biology Laboratory Caption This microscopy image, taken ten days after injury, shows that the muscle fibers of normal mice (left) had re-grown, while in mice which couldn’t boost C/EBPb production (right), there were still many fibers that had not regenerated (arrowheads), and the tissue had a number of scars (arrows). Credit European Molecular Biology Laboratory 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.