6LU8:
reference: Structural snapshots of human pre-60S ribosomal particles before and after nuclear export., Liang X, Zuo MQ, Zhang Y, Li N, Ma C, Dong MQ, Gao N, Nat Commun. 2020 Jul 15;11(1):3542. doi: 10.1038/s41467-020-17237-x. PMID: 32669547

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