In this experiment we started with lucigenin containing liposomes without any azine and a control run was recorded. Then 1 mol% of TB was post-inserted by adding a solu7on of TB in acetonitrile to the liposomes and, afer 3 minutes, a transport measurement was recorded, showing very poor transport ac7vity (Fig. , red curve). Next, 5 equiv. of AA were added to the liposomes already containing TB and, afer 2h, that sample showed clear transport of Cl -(Fig. , blue curve). Upon DCvC inside the liposomal membranes, TB and AA could react to form a mixture of TA, TB, TT, AA, AB, BB, of which only TA is an ac7ve anion transporter, expected to be formed at max. 0.8 mol%. The observa7on of clear transport upon mixing TB and AA thus indicates that TA has been formed in this more complex dynamic combinatorial library inside the membrane.