1 Research Group of Proteomics and ADP-ribosylation Signaling, Max Planck Institute for Biology of Ageing, 50931 Cologne, Germany. Electronic address: Helen.Dauben@age.mpg.de.
2 Research Group of Proteomics and ADP-ribosylation Signaling, Max Planck Institute for Biology of Ageing, 50931 Cologne, Germany; Cologne Excellence Cluster for Stress Responses in Ageing-Associated Diseases (CECAD), University of Cologne, 50931 Cologne, Germany. Electronic address: imatic@age.mpg.de.
3 Department of Molecular Biology and Genetics, Aarhus University, 8000 Aarhus C, Denmark. Electronic address: rtk@mbg.au.dk.
4 Department of Molecular Biology and Genetics, Aarhus University, 8000 Aarhus C, Denmark. Electronic address: bpp@mbg.au.dk.
5 Laboratory of Genome Diversification and Integrity, Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin 13125, Germany; Freie Universität Berlin, Berlin 14195, Germany. Electronic address: tannishtha.saha@mdc-berlin.de.
6 Laboratory of Genome Diversification and Integrity, Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin 13125, Germany; Charité-Universitätsmedizin Berlin, Berlin 10117, Germany. Electronic address: Michela.DiVirgilio@mdc-berlin.de.
7 Cell Art Department, Cell Press, Cambridge, MA, USA. Electronic address: jsung@cell.com.