Phosphorylation of SMAD2,3 by Activin:Activin Receptor (Xenopus tropicalis)
phosphorylation of smad2,3 by activin:activin receptor (xenopus tropicalis)
Phosphorylation of SMAD2,3 by Activin:Activin Receptor (Xenopus tropicalis)
phosphorylation of smad2,3 by activin:activin receptor (xenopus tropicalis)