Fig. 6. Dependence of t _on (A) and t _off (B) on the concentration of b CD (trans and cis) for P_NN-E and P_NN-R. The linear relationship of 1/t _on with [b CD] and the lack of dependence of 1/t _off on [b CD] show that the kinetics of the interaction between b CD and a HL are consistent with a simple binary interaction: a HL + b CD ↔ a HL•b CD. ●, P_NN-E with trans b CD; □, P_NN-E with cis b CD; ■, P_NN-R with trans b CD; □, P_NN-R with cis b CD.