Cells were collected in lysis buffer as described (Zaoui et al., 2008 (link)). Western blotting was performed using antibodies directed against mDia1, IQGAP1, HAX1 (BD Biosciences, Le Pont de Claix, France), Dia2c (Santa Cruz Biotechnology, Dallas, TX), mDia2/DRF3 (a kind gift from H. N. Higgs, Dartmouth Medical School, Hanover, NH), α-tubulin, ELKS (Sigma-Aldrich, Lyon, France), and GFP (Roche, Meylan, France).