Phospho-proteomic changes upon CK1tauoverexpression. Volcano plot visualising quantified phosphopeptides in the parent line and in CK1tau-OX21. Blue datapoints represent significantly differential phospho-sites in a pairwise comparison; black circles represent those that do not change significantly. Criteria were p < 0.05 (horizontal line) and fold changes >1.5 or <0.67 (vertical lines). The identities of sites can be found in Additional file 1.