HelixConstraint T19 S27 0.723 HelixConstraint M43 F50 0.639 HelixConstraint V57 A63 0.635 HelixConstraint A72 M79 0.717 HelixConstraint K84 Y90 0.679 HelixConstraint A107 C116 0.63 HelixConstraint M124 N129 0.618