用NMR测量膜蛋白中的残余双极合的正电荷液晶介质

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Updated: Apr 4, 2026

Crystallizing Membrane Proteins for Structure Determination using Lipidic Mesophases
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Crystallizing Membrane Proteins for Structure Determination using Lipidic Mesophases

Published on: November 21, 2010

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Pallavi Thiagarajan-Rosenkranz1, Adrian W Draney1, Sean T Smrt1

  • 1Department of Chemistry, University of Illinois at Chicago , 845 West Taylor Street, Chicago, Illinois 60607, United States.

Journal of the American Chemical Society
|September 9, 2015
PubMed
概括

研究人员为核磁共振 (NMR) 研究开发了一种新的正电荷液晶介质 - - 皮纳西酸 (PNA). 这一进步提高了使用残余双极合 (RDC) 确定膜蛋白结构的准确性.

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Chemical Shift: Internal References and Solvent Effects01:17

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In an NMR sample, precise measurement of the absolute absorption frequencies of nuclei is difficult. A standard internal reference compound is added, and the frequency difference between the reference signal and sample signals is measured.
The internal reference compound generally used in NMR spectroscopy is tetramethylsilane (TMS). TMS is preferred because it is chemically inert, soluble in NMR solvents, and easily removable. Also, the highly shielded methyl protons in TMS yield an intense...
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