38A Spurs Cells to Manufacture Var IV (image) Rockefeller University Press Caption Researchers show that the small RNA 38A spurs cells to manufacture Var IV, a splice variant of a key neuronal protein, and potentially promote Alzheimer's disease. In this image, Var IV (green) is prevalent in cells that make extra 38A (left) but rare in control cells (right). Credit Massone, S., et al. 2011. J. Cell Biol. doi:10.1083/jcb.201011053. Usage Restrictions Reporters may freely use these materials in news coverage, with the appropriate credit information. 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.