Figure 7

Gd³⁺ block of TRPV6 channel Equilibrium positions of Gd³⁺ (pink, red, or blue spheres) and Na⁺ (white spheres) ions (a,b) and the G1 and G2 trajectories along the channel axis (c,d) in (a,c) G1 simulation at low Gd³⁺ concentration with a single Gd³⁺ ion (red) and (b,d) G3 simulation at a higher Gd³⁺ concentration with two Gd³⁺ ions (blue and red) around D541. The trajectories (c,d) of individual Na⁺ ions are shown in various shades of grey, while Gd³⁺ trajectories are in the same colors as ions in (a,b). The horizontal red dashed lines indicates the level which would be crossed if ion permeates the channel.