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. Author manuscript; available in PMC: 2010 Nov 1.
Published in final edited form as: J Biomol NMR. 2009 Jul 31;45(3):245–253. doi: 10.1007/s10858-009-9358-3

Fig. 2.

Fig. 2

Isotropic 15N chemical shieldings for selected helical residues calculated using various models. Where applicable, the ionizable side chains of residues i and i−1 are neutral in (a) but charged in (b)