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Angles used in this study. (A) Two different sample orientations (parallel (ε=0°) and perpendicular (ε=90µ)) with respect to magnetic field (B0), (B) Helix tilt angle () and rotational angle of peptide about the helix axis (ψ), (C) Orientations of nitroxide with respect to helix axis (θ and φ), and (D) Three Euler angles of rotation (α, β and γ) and orientations (η and ξ) of interelectron distance (R) with respect to nitroxide position.
