FIG 8.

Backbone torsion angles for each of the amino acids in the GS peptide, as determined by various structural methods. GS structures are denoted with Roman numerals: I, GS in 1,2-di-O-tetradecyl-sn-glycero-3-phosphocholine (DM-O-PC), as determined in this work by solid-state NMR; II, GS in DMPC, calculated by all-atom MD (15); III, GS in DMSO, calculated by all-atom MD (45); IV, GS in methanol, calculated by all-atom MD in reference 46; V, GS in DMSO, determined by liquid-state NMR (13); VI, GS in CHCl₃-methanol, determined by solution state NMR (14); VII, GS in crystal, grown in the presence of urea and HCl (11); VIII, GS in crystal, grown in the presence of TFA and HCl (12); IX, free GS structure (in vacuo) as predicted in reference 9; X, free GS structure (in vacuo) as predicted in reference 10.