3ZN8:
reference: Structural basis of signal sequence surveillance and selection by the SRP-FtsY complex., von Loeffelholz O, Knoops K, Ariosa A, Zhang X, Karuppasamy M, Huard K, Schoehn G, Berger I, Shan SO, Schaffitzel C, Nat Struct Mol Biol. 2013 Apr 7. doi: 10.1038/nsmb.2546. PMID: 23563142

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