4M6F:
reference: Exploiting large non-isomorphous differences for phase determination of a G-segment invertase-DNA complex., Ritacco CJ, Steitz TA, Wang J, Acta Crystallogr D Biol Crystallogr. 2014 Mar;70(Pt 3):685-93. doi:, 10.1107/S1399004713032392. Epub 2014 Feb 15. PMID: 24598738

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