4AC9:
reference: Selenocysteine tRNA-specific elongation factor SelB is a structural chimaera of elongation and initiation factors., Leibundgut M, Frick C, Thanbichler M, Bock A, Ban N, EMBO J. 2005 Jan 12;24(1):11-22. Epub 2004 Dec 23. PMID: 15616587

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