Figure 7.

“Apparent” GALA quadrupolar wave plots for transmembrane peptide helices in DLPC (red circles), DMPC (blue triangles), or DOPC (black squares) oriented bilayer membranes. (A) GW^5,19ALP23, (B) Y^4,5GW¹⁹ALP23, and (C) GW^4,20ALP23 are shown. (C) denotes the positions of the deuterium-labeled alanine residues. Only (A) reflects correctly the variation of the helix tilt τ₀ and the constant helix azimuthal rotation ρ₀ in the different bilayers. The amplitudes and phases of the waves in (B) and (C) reflect excessive dynamic averaging of the ²H quadrupoles. See text for details. See also Table 4. To see this figure in color, go online.