Fig. 9. Expression of full-length DG and DG mutants in a pure DG^-/- MEpL cell line restored ß-casein protein expression in response to laminin-111. Western blot of cell extracts prepared from cells infected with retroviral vector (VEC) or that encoding full-length DG (wtDG) or various ß-DG cytoplasmic deletions (DEL A, B and C) and incubated with a laminin-111 overlay in the absence (-) or presence (+) of prolactin and hydrocortisone. Blots were incubated with antibodies specific for ß-casein or E-cadherin (loading control), followed by HRP-conjugated secondary antibodies. Sizes of molecular mass markers are shown in kDa.