E3 ubiquitin ligase RNF111 (Arkadia) binds SMAD7 in the nucleus (Koinuma et al. 2003).
Miyazono, K, Goto, K, Shinozaki, M, Imamura, T, Nukiwa, T, Komuro, A, Ebina, M, Miyazawa, K, Saitoh, M, Hanyu, A, Koinuma, D
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