PPP2CA and breast carcinoma: Although it was previously shown that PP2A-C and B56γ subunits co-immunoprecipitate with paxillin from transfected NIH-3T3 cells38, we did not detect any interaction between B56γ and paxillin by immunoprecipitation from migratory MDA-MB-231 breast cancer cells (Supplementary Fig. 6), while B56γ efficiently precipitated endogenous liprin-α1 in these cells.