HelixConstraint V14 K17 0.618 HelixConstraint E51 L58 0.719 HelixConstraint H84 F88 0.609 StrandConstraint F103 G107 0.657 HelixConstraint E123 H133 0.752 HelixConstraint W143 F152 0.637 HelixConstraint E245 G251 0.61 HelixConstraint H279 C291 0.623