1MZP:
reference: Structure of the L1 protuberance in the ribosome., Nikulin A, Eliseikina I, Tishchenko S, Nevskaya N, Davydova N, Platonova O, Piendl W, Selmer M, Liljas A, Drygin D, Zimmermann R, Garber M, Nikonov S, Nat Struct Biol 2003 Feb;10(2):104-8. PMID: 12514741

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