6EK0:
reference: Visualization of chemical modifications in the human 80S ribosome structure., Natchiar SK, Myasnikov AG, Kratzat H, Hazemann I, Klaholz BP, Nature. 2017 Nov 23;551(7681):472-477. doi: 10.1038/nature24482. Epub 2017 Nov, 15. PMID: 29143818

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