Enzyme Could Be Alzheimer's Disease Biomarker (image) American Chemical Society Share Print E-Mail Caption Researchers used mice studies to reveal that MAO activity (yellow) is directly correlated with the progression of Alzheimer's disease and may be used to stage the disease. Credit American Chemical Society Usage Restrictions Please credit the American Chemical Society when using this image. Share Print E-Mail 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.