Coating of cell culture dishesCoat 60-mm dishes with proper ECM substrates for the cell type to be studied (e.g., for fibroblasts, use 10 mug ml- 1 fibronectin or 50 mug ml- 1 poly-L-lysine as a control) by incubating the dishes overnight at 4 °C or for 2 h at 37 °C without rotation or shaking.