(a–f): GB1 structure illustrating origins of REDOR effects for the methyl bearing and aromatic residues. (a–b) shows a few methyl bearing residues Ala (a) and Thr,Val (b), (c) shows Y45 and D46, (d) shows F52 and E27, (e) shows Y3, K31 and W43, (f) shows Y33 and N37. The black dotted lines indicate the distances between 1HN and C(methyl) (a–b) and C(aromatics) (c–f). Figure f shows distances to sidechain amino 1H of N37. All the figures have been rendered in VMD.