HelixConstraint E4 A10 0.601 HelixConstraint K20 I31 0.679 HelixConstraint D49 A55 0.657 HelixConstraint A61 H71 0.641 HelixConstraint P75 A82 0.694 StrandConstraint R87 F88 0.659 StrandConstraint F94 G96 0.641 HelixConstraint P100 Q107 0.715 HelixConstraint P110 L128 0.649 HelixConstraint V130 A135 0.662