| Predicate | Object |
|---|---|
| rdf:type | |
| biopax3:comment |
Activated type I receptor kinase directly phosphorylates two of the C-terminal serine residues of SMAD2 or SMAD3. Binding of these R-SMADs to the L45 loop of the type I receptor is critical for this event.
|
| biopax3:xref | |
| biopax3:evidenceCode |