Extended Data Fig. 1: FRET response of several binding-domain variants to increasing substrate concentration.

a, Wild-type TrpR. b–q, Engineered TrpR variants. Each mark indicates a single measurement. Circle, IAA; rhombus, TRP; square, IAN.

a, Wild-type TrpR. b–q, Engineered TrpR variants. Each mark indicates a single measurement. Circle, IAA; rhombus, TRP; square, IAN.