The Role Of Introns In Heterochromatin Formation (image) Kumamoto University Share Print E-Mail Caption RNA sequences called 'introns' promote heterochromatin structure formation. However, a mutation in the Prp16 protein makes it impossible to accurately segregate chromosomes during cell division. Credit Associate Professor Tokio Tani Usage Restrictions This image may only be used in conjunction with the accompanying release, or stories written about the work described in the release with reference to the original work. 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.