Profiling ubiquitin linkage specificities of deubiquitinating enzymes with branched ubiquitin isopeptide probes. - Iphöfer, A; Kummer, A; Nimtz, M; Ritter, A; Arnold, T; Frank, R; van den Heuvel, J; Kessler, B; Jänsch, L; Franke, R (2012)