Fig. 4.

Transport of different cations by ZntB. Transport of different cations (added at 1 min and colour-coded: black—20 µM Zn²⁺, red—20 µM Cd²⁺, blue—100 µM Ni²⁺, green—200 µM Co²⁺, dark blue—empty liposomes with 20 µM Zn²⁺, magenta—empty liposomes with 200 µM Co²⁺) assayed by the fluorophore Fluozine-1 trapped inside the proteoliposomes