HelixConstraint G37 R42 0.759 StrandConstraint V72 I73 0.647 HelixConstraint G112 F114 0.619 HelixConstraint D242 G256 0.815 StrandConstraint K277 F280 0.601 HelixConstraint M317 A321 0.679 HelixConstraint A323 I324 0.681 HelixConstraint T333 L334 0.605