Figure 10
Electron-density omit map of the active-site region of A53_2. The two Zn2+ ions and the electron density of an unidentified six-membered ring, labeled X3B, were omitted in calculating the electron densities. The 2Fo − Fc omit map, contoured at 1σ, is shown in black. The Fo − Fc omit map, contoured at 3σ, is shown in green. The two Zn2+ ions are shown as magenta spheres. |