<p>1. Semisynthesis of ubiquitinated histone H2B with a native or nonhydrolyzable linkage<br>Michael Morgan, Muhammad Jbara, Ashraf Brik and Cynthia Wolberger<br>2. Dual-color pulse-chase ubiquitination assays to simultaneously monitor substrate priming and extension<br>Daniel C. Scott and Brenda A. Schulman<br>3. A genetic approach to study polyubiquitination in Saccharomyces cerevisiae<br>Fernando Meza-Gutierrez, Deniz Simsek and David P. Toczyski<br>4. Enzymatic preparation of monoubiquitinated FANCD2 and FANCI proteins<br>Viduth K. Chaugule, Connor Arkinson, Rachel Toth and Helen Walden<br>5. Methods to measure ubiquitin chain length and linkage<br>Fumiaki Ohtake, Hikaru Tsuchiya, Keiji Tanaka and Yasushi Saeki<br>6. Detection of ubiquitination activity and identification of ubiquitinated substrates using TR-TUBE<br>Yukiko Yoshida, Yasushi Saeki, Hikaru Tsuchiya and Keiji Tanaka<br>7. Methods to study phosphoribosylated ubiquitin ligation and removal<br>Jiazhang Qiu and Zhao-Qing Luo<br>8. Biochemical characterization of SUMO-conjugating enzymes by in vitro sumoylation assays<br>Nathalie Eisenhardt, Dragana Ilic, Easa Nagamalleswari and Andrea Pichler<br>9. Methods to study SUMO dynamics in yeast<br>Stefan Pabst, Lennard-Maximilian Döring, Natasha Petreska and R. Jürgen Dohmen<br>10. Approaches for investigating the extracellular signaling function of ISG15<br>Caleb D. Swaim, Larissa A. Canadeo and Jon M. Huibregtse<br>11. Analysis of modification and proteolytic targeting by the ubiquitin-like modifier FAT10<br>Annette Aichem, Annika N. Boehm, Nicola Catone, Gunter Schmidtke and Marcus Groettrup<br>12. Methods to analyze STUbL activity<br>Emma Branigan, Anna Plechanovová and Ronald T. Hay<br>13. Quantitative analysis of USP activity in vitro<br>Shreya Dharadhar, Robbert Q. Kim, Michael Uckelmann and Titia K. Sixma<br>14. Evaluating enzyme activities and structures of DUBs<br>Jonathan N. Pruneda and David Komander<br>15. Purification and functional characterization of the DUB domain of SdeA<br>Kedar Puvar, Shalini Iyer, Michael J. Sheedlo and Chittaranjan Das<br>16. Profiling DUBs and Ubl-specific proteases with activity-based probes<br>Paul P. Geurink, Gerbrand J. van der Heden van Noort, Monique P.C. Mulder, Robert C.M. Knaap, Marjolein Kikkert and Huib Ovaa<br>17. Assays of SUMO protease/isopeptidase activity and function in mammalian cells and tissues<br>Kathrin Kunz, Stefan Müller and Luca Mendler</p>