HelixConstraint I3 E15 0.736 StrandConstraint D21 D26 0.744 StrandConstraint R36 V39 0.71 HelixConstraint N45 E61 0.782 StrandConstraint W77 D81 0.738 StrandConstraint V85 H88 0.753 HelixConstraint P92 A102 0.617