TDP (IMAGE) Johns Hopkins Medicine Caption A Johns Hopkins Medicine-led team has developed a fluid biomarker that may one day detect two degenerative diseases, ALS and FTD, before symptoms appear. The biomarker locates a protein associated with the loss of function for the TDP-43 protein (seen as a molecular model in this image), an abnormality linked to people who develop ALS or FTD. Credit Public domain image via Protopedia.org Usage Restrictions No restrictions. License Public Domain 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.