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. Author manuscript; available in PMC: 2014 Sep 17.
Published in final edited form as: Acc Chem Res. 2013 Mar 7;46(9):2172–2181. doi: 10.1021/ar3003442

Figure 1.

Figure 1

From an 15N labeled site, such as in the inset image of a peptide plane from a TM helix, the component of the chemical shift tensor (δii) and dipolar interaction (νNH) parallel to the magnetic field (Bo) can be assessed as structural restraints.