All PCR products were confirmed by sequencing. The following antibodies were
used: anti-Bcl-3, c-Myc, cyclinD1, p27, p21, vimentin, E-cadherin,
N-cadherin, ID1, FLAG, HA, ubiquitin (Santa Cruz Biotechnology, Inc., Santa
Cruz, CA, USA), anti-Snail, ID3, RBX1 (Proteintech), anti-phos-ERK,
phos-AKT, AKT, phos-Smad3, Smad3, phos-Smad2, Smad2, Lamin A/C (Cell
Signaling Technology, Boston, MA, USA), anti-GAPDH, donkey anti-Goat IgG
(HRP), goat anti-Mouse IgG (HRP), goat anti-Rabbit IgG (HRP) (KANGCHEN,
Shanghai, China), anti-Actin (Sigma-Aldrich, St. Louis, MO, USA),
anti-K63-ubiquitin, K48-ubiquitin (Millipore, Billerica, MA, USA), donkey
anti-goat coupled to AlexaFluor®488, and donkey anti-mouse or rabbit IgG
coupled to AlexaFluor680 (Invitrogen, Carlsbad, CA, USA). Anti-Smad3
Ser423/425 (Cell Signaling Technology), anti-Smad2/3 pT8,
anti-Smad2/3 pT179, anti-Smad3 pS204, anti-Smad3 pS208, anti-Smad3 pS213
were kind gifts from Dr Liu Fang.