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pubmed-article:11700091pubmed:dateCreated2001-11-8lld:pubmed
pubmed-article:11700091pubmed:abstractTextA simple method is presented to accurately determine (15)N-[(1)H] NOEs in biomolecules in the presence of H(N)-water proton chemical exchange. Three measurements are required: one with nonselective proton saturation and two with different water saturation conditions to determine the equilibrium value of the (15)N signal. This approach is exemplified with data on two peptides, one helix-forming 17-mer and one compactly folded 56-mer. Results indicate that (15)N-[(1)H] NOEs determined using the standard approach with short recycle times (3 to 4 s) can be significantly in error when H(N)-water proton chemical exchange is relatively rapid, water proton relaxation is relatively slow, and (15)N-[(1)H] NOEs are away from the value of -1. This new method avoids such inaccuracies resulting from the use of short recycle times.lld:pubmed
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pubmed-article:11700091pubmed:monthNovlld:pubmed
pubmed-article:11700091pubmed:issn1090-7807lld:pubmed
pubmed-article:11700091pubmed:authorpubmed-author:MayoK HKHlld:pubmed
pubmed-article:11700091pubmed:authorpubmed-author:DaraganV AVAlld:pubmed
pubmed-article:11700091pubmed:authorpubmed-author:IdiyatullinDDlld:pubmed
pubmed-article:11700091pubmed:copyrightInfoCopyright 2001 Academic Press.lld:pubmed
pubmed-article:11700091pubmed:issnTypePrintlld:pubmed
pubmed-article:11700091pubmed:volume153lld:pubmed
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pubmed-article:11700091pubmed:pagination138-43lld:pubmed
pubmed-article:11700091pubmed:dateRevised2007-11-14lld:pubmed
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pubmed-article:11700091pubmed:year2001lld:pubmed
pubmed-article:11700091pubmed:articleTitleImproved measurement of (15)N-[(1)H] NOEs in the presence of H(N)-water proton chemical exchange.lld:pubmed
pubmed-article:11700091pubmed:affiliationDepartment of Biochemistry, Molecular Biology, & Biophysics, University of Minnesota Health Sciences Center, 6-155 Jackson Hall, 321 Church Street, Minneapolis, MN 55455, USA.lld:pubmed
pubmed-article:11700091pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:11700091pubmed:publicationTypeResearch Support, U.S. Gov't, P.H.S.lld:pubmed
pubmed-article:11700091pubmed:publicationTypeResearch Support, U.S. Gov't, Non-P.H.S.lld:pubmed
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