1ZDK:
reference: Crystallographic studies of RNA hairpins in complexes with recombinant MS2 capsids: implications for binding requirements., Grahn E, Stonehouse NJ, Murray JB, van den Worm S, Valegard K, Fridborg K, Stockley PG, Liljas L, RNA 1999 Jan;5(1):131-8. PMID: 9917072

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