Fig. 6.

Plot of S/S₀ intensity vs backbone amide (left) and sidechain (right) amino protons in uniformly labeled ²H, ¹³C, ¹⁵N labeled GB1 protein, back-exchanged with 30% amide protons. (a) shows the plot for ¹³CH₃ dephasing for 600 us, and (b) shows the plot for aromatic ¹³C dephasing for 600 us. The residues showing maximum dephasing have been labeled. Red asterisks indicate that the corresponding residues have overlapped peaks in the ¹⁵N-¹H spectrum.