3U4M:
reference: High-resolution crystal structure of the isolated ribosomal L1 stalk., Tishchenko S, Gabdulkhakov A, Nevskaya N, Sarskikh A, Kostareva O, Nikonova E, Sycheva A, Moshkovskii S, Garber M, Nikonov S, Acta Crystallogr D Biol Crystallogr. 2012 Aug;68(Pt 8):1051-7. Epub 2012 Jul 17. PMID: 22868771

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