HelixConstraint L3 M8 0.676 StrandConstraint F20 R23 0.82 StrandConstraint Y30 L36 0.637 HelixConstraint Q43 L53 0.828 HelixConstraint Q64 E71 0.668 HelixConstraint Q74 I96 0.69 StrandConstraint L100 L103 0.61