Unmodified counterpart peptide data for PML peptides affected by lysine modifications. Related to Fig. 6 and Fig. 7. (A) PML schematic showing positions of lysines modified by SUMO or ubiquitin. (B) Average (column) and SEM (bars) for the sum all unmodified counterpart peptide intensities identified in each YFP-PML purification. Ordinary one-way ANOVA P value is indicated. Number of purifications, n = 4. (C) Total unmodified counterpart peptide intensity data broken down by site. (D) Average intensity values for the sum of all counterpart peptides relating to modification at the indicated lysine. Boxed plots relate to the canonical major SUMO acceptor lysines. Error bars show SEM (number of purifications, n = 4). (E)t test summary for the pairwise comparisons indicated for each SUMO-PML modification. Welch’s correction was applied for heteroskedastic data. Red entries are P < 0.05. The number of different counterpart peptides used for each site is indicated as evidence count.