4KJZ:
reference: Initiation factor 2 crystal structure reveals a different domain organization from eukaryotic initiation factor 5B and mechanism among translational GTPases., Eiler D, Lin J, Simonetti A, Klaholz BP, Steitz TA, Proc Natl Acad Sci U S A. 2013 Sep 24;110(39):15662-7. doi:, 10.1073/pnas.1309360110. Epub 2013 Sep 12. PMID: 24029018

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