Additional file 1 of Proteomic analysis of degradation ubiquitin signaling by ubiquitin occupancy changes responding to 26S proteasome inhibition HristovaVentzislava SunShisheng ZhangHui ChanDaniel 2020 Additional file 1: Table S1. Ubiquitin occupancy of partially ubiquitinated peptides detected in the ubiquitinated and non-ubiquitin modified form in SKOV3 ovarian cancer cells after MG132 treatment. Table S2. Ubiquitinated peptides that are only detected in the modified state in ubiquitin-enriched samples following MG132 treatment of SKOV3 cells. Table S3. Ubiquitin occupancy of partially ubiquitinated peptides identified in the DMSO control treated sample. Table S4. Peptides only detected as ubiquitinated after DMSO treatment, with no corresponding non-ubiquitinated form in the global DMSO data set