HelixConstraint V281 E287 0.764 HelixConstraint T299 L305 0.866 HelixConstraint D307 Q308 0.715 HelixConstraint E334 Q341 0.682 HelixConstraint E348 A352 0.69 StrandConstraint M363 A365 0.725 HelixConstraint A372 V387 0.623 StrandConstraint A394 I397 0.8 StrandConstraint M406 E408 0.692