HelixConstraint S23 F27 0.802 HelixConstraint S36 A38 0.707 HelixConstraint T49 M52 0.926 HelixConstraint I54 L56 0.704 HelixConstraint S63 W67 0.656 HelixConstraint N69 L70 0.8 HelixConstraint N72 A77 0.777