Simply Remove the Molecular Tags (image) Université de Genève Caption The binding of Rif1 (red) to the PP1 enzyme (orange) inactivates DNA replication by removal of the molecular "tags" (violet) to the replication complex (green). Credit David Shore, UNIGE Usage Restrictions With mention of the credit. 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.