3J47:
reference: Formation of an Intricate Helical Bundle Dictates the Assembly of the 26S Proteasome Lid., Estrin E, Lopez-Blanco JR, Chacon P, Martin A, Structure. 2013 Jul 31. pii: S0969-2126(13)00247-5. doi:, 10.1016/j.str.2013.06.023. PMID: 23911091

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