MDM2 undergoes auto-ubiquitination (Fang et al. 2000). Formation of homodimers may not be necessary for auto-ubiquitination (Cheng et al. 2011).
Fang, S, Jensen, JP, Ludwig, RL, Vousden, KH, Weissman, AM
Cheng, Q, Cross, B, Li, B, Chen, L, Li, Z, Chen, J
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