PathwayStep6342 PathwayStep130 PathwayStep126 PathwayStep121 PathwayStep123 PathwayStep124 PathwayStep119 PathwayStep111 PathwayStep110 PathwayStep143 PathwayStep141 PathwayStep140 PathwayStep146 The SMAD2/3:SMAD4 complex transfers to the nucleus PathwayStep5935