Brain injury drug (IMAGE) PNAS Nexus Caption The p17 transporter in mice leads to the buildup of damaged and disorganized membranes in axonal mitochondria. This accumulation eventually results in the degeneration of myelinated neuronal axons (shown in green) following repetitive mild traumatic brain injury. Credit Karakaya et al. Usage Restrictions None 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.