Formaldehyde (image) Max-Planck-Gesellschaft Caption Formaldehyde, generated in cells or derived from the environment, can crosslink DNA to proteins, which interferes with DNA replication. The newly identified repair protein Wss1 chops down the protein component of DNA-protein crosslinks, thereby enabling cells to complete replication. Credit MPI of Biochemistry/ S. Jentsch Usage Restrictions None 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.