Human cells (IMAGE) University of Bonn Caption SMN is concentrated in the Cajal bodies (left, red) in the nucleus of human cells (blue). If phosphorylation of SMN is inhibited, the concentration ceases and Cajal bodies disappear. Credit © AG Gruss / University of Bonn Usage Restrictions Please use this picture only in connection with the press release. 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.