Aromatic ring orientation in apoC-II(60-70) and cyc(60

–70). A histogram of the Tyr63 and Phe67 relative aromatic ring orientation (X-axis) obtained from the 2.8 µs ensemble trajectory. Typical structures illustrating the relative ring orientations of cyc(60–70) (red) and apoC-II(60–70) (blue) are represented as insets.