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Brown EN, Ramaswamy S.Brown EN, et al. Among authors: ramaswamy s.Acta Crystallogr D Biol Crystallogr. 2007 Sep;63(Pt 9):941-50. doi: 10.1107/S0907444907033847. Epub 2007 Aug 17.Acta Crystallogr D Biol Crystallogr. 2007.PMID: 17704562