4V5H:
reference: Structural insight into nascent polypeptide chain-mediated translational stalling., Seidelt B, Innis CA, Wilson DN, Gartmann M, Armache JP, Villa E, Trabuco LG, Becker T, Mielke T, Schulten K, Steitz TA, Beckmann R, Science. 2009 Dec 4;326(5958):1412-5. Epub 2009 Oct 29. PMID: 19933110

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