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. Author manuscript; available in PMC: 2012 Nov 1.
Published in final edited form as: J Biomol NMR. 2011 Aug 26;51(3):303–312. doi: 10.1007/s10858-011-9556-7

Table 2.

Reduced 13C and 15N CSA (Δδred) averages for α-helical and β-sheet regions of GB1; also reported are the uncertainties in the mean values.

PDB method Nuclei Helix Sheet Difference
2qmt 1 13C −86.3±0:8 −84.5±0:5 −1.8
2 13C −76.2±0:8 −74.9±0:5 −1.4
1pga 1 13C −87.6±0:5 −84.1±0:5 −3.5
2 13C −76.8±0:8 −74.3±0:5 −2.5
experimental 13C −83.0±0:8 −78.2±0:5 −4.8
2qmt 1 15N 108.2±1:5 102.1±0:8 6.1
2 15N 101.8±1:4 95.6±0:8 6.2
1pga 1 15N 107.9±0:9 103.6±0:9 4.3
2 15N 101.6±1:3 96.6±0:8 5.0
experimental 15N 114.0±1:3 106.7±0:7 7.3