| Name | SMAD protein complex |
| ID | GO_0071141 |
| collection_id | Cellular component |
| Exact synonym | SMAD complex |
| Description | A protein complex that consists of only SMAD proteins; may be homomeric or heteromeric. Heteromeric complexes act as transcription factors while homomeric complexes exist but are transcriptionally inactive. Hetero- versus homotrimerization is largely enthalpy driven. |
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| Genes |