Vasopressin effects on phosphoproteome of mpkCCD cells. A. Torch plot for phosphopeptides quantified across all three pairs (dDAVP vs. vehicle) of mpkCCD cell clones. Vertical dashed lines show log2(dDAVP/Vehicle) of 0.4, and −0.4, while the horizontal line represents −log10(CV) of 0.4 (CV=0.4). These phosphopeptides are found in 295 distinct phosphoproteins. Out of 9640 quantified phosphopeptides, 429 were altered (increased, 187; decreased, 242) according to the thresholds defined above. These phosphopeptides consisted of 332 mono-phosphopeptides (increased, 153; decreased, 179) and 97 multi-phosphorylated peptides. B. Motif analysis shows the amino acid residues over-represented in sets of unique mono-phosphopeptides whose abundances are significantly increased (141 phospho-sites, corresponds to 153 mono-phosphopeptides; upper panel) and decreased (172 phospho-sites, corresponds to 179 mono-phosphopeptides; lower panel). PTM-Logo was used with whole mouse dataset as background and Chi-square cutoff was set at 0.0001.