HelixConstraint K13 K17 0.691 HelixConstraint I29 Q31 0.628 HelixConstraint T72 T74 0.619 StrandConstraint F103 T106 0.828 HelixConstraint L124 H133 0.762 StrandConstraint M139 I141 0.66 HelixConstraint Q146 F152 0.678 HelixConstraint Y246 R252 0.663 HelixConstraint T275 I292 0.678