HelixConstraint (T0305)F27 (T0305)R32 HelixConstraint (T0305)T106 (T0305)Q117 HelixConstraint (T0305)A210 (T0305)A223 HelixConstraint (T0305)G240 (T0305)D257 HelixConstraint (T0305)N262 (T0305)T272 HelixConstraint (T0305)T280 (T0305)G297