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title = {{Spatial elucidation of motion in proteins by ensemble-based structure calculation using exact {NOEs}}},  journal = {Nat Struct Mol Biol},  }  @article{16866544,  title = {{Cooperative hydrogen bonding effects are key determinants of backbone amide proton chemical shifts in proteins.}},  date = {2006 Aug 2},  source = {J Am Chem Soc},  authors = {Parker, LL and Houk, AR and Jensen, JH},  author = {Parker, LL and Houk, AR and Jensen, JH},  year = {2006},  month = {Aug},  journal = {J Am Chem Soc},  volume = {128},  number = {},  pages = {9863-72},  pubmed_id = {16866544},  }