HelixConstraint V7 A23 0.734 HelixConstraint A29 E38 0.653 HelixConstraint D55 A67 0.625 HelixConstraint A75 N87 0.67 HelixConstraint S102 D112 0.611 HelixConstraint K125 R134 0.74 HelixConstraint M144 G156 0.623 StrandConstraint W169 F172 0.614