Figure 3.

(A) Stereoview of the F96M EIZS–Mg²⁺₃–PP_i–BTAC complex, showing Polder omit maps of the BTAC cation (green mesh, 4σ), inorganic pyrophosphate (orange mesh, 4σ), Mg²⁺ ions (blue mesh, 4σ), and M96 (ruby mesh, 4σ). Atoms are color coded as follows: C = violet (protein), or green (BTAC); N = blue; O = red; P = orange; Mg²⁺ ions = magenta spheres. (B). Stereoview showing the superposition of the F96M EIZS–Mg²⁺₃–PP_i–BTAC complex (color-coded as in (A)) with the wild-type EIZS–Mg²⁺₃–PP_i–BTAC complex (blue; BTAC, cyan; PDB 3KB9). Minimal structural differences are observed for active site aromatic residues and BTAC.