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Main ER, Lowe AR, Mochrie SG, Jackson SE, Regan L.Main ER, et al.Curr Opin Struct Biol. 2005 Aug;15(4):464-71. doi: 10.1016/j.sbi.2005.07.003.Curr Opin Struct Biol. 2005.PMID: 16043339Review.