3NNQ:
reference: X-ray crystal structure of the N-terminal region of Moloney murine leukemia virus integrase and its implications for viral DNA recognition., Guan R, Aiyer S, Cote ML, Xiao R, Jiang M, Acton TB, Roth MJ, Montelione GT, Proteins. 2017 Jan 9. doi: 10.1002/prot.25245. PMID: 28066922

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