HelixConstraint L18 S20 0.777 HelixConstraint L25 T34 0.693 HelixConstraint I41 K51 0.742 HelixConstraint I59 I71 0.733 HelixConstraint K86 I93 0.617 HelixConstraint D102 Q114 0.638 HelixConstraint L127 E131 0.776