Nurturing Life Sciences
#Id: 10069
#Id: 9341
#XL - T Zoology
#Id: 8648
#Id: 1315
#Id: 9364
Simultaneously, two serines in each Smad2/3 phosphorylated by RI receptor kinase bind to phosphoserine-binding sites in the MH2 domains of a Smad4
#Id: 8210
#XL - Q Biochemistry