284D:
reference: The bi-loop, a new general four-stranded DNA motif., Salisbury SA, Wilson SE, Powell HR, Kennard O, Lubini P, Sheldrick GM, Escaja N, Alazzouzi E, Grandas A, Pedroso E, Proc Natl Acad Sci U S A 1997 May 27;94(11):5515-8. PMID: 9159103

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