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![[Figure 6]](nj5323fig6mag.jpg)
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Figure 6
Ribbon representation of the A53_3 variant. It shows the octapeptide tag on subunit B penetrating the active-site region of the symmetry-related subunit A. The tag is shown in magenta. The active-site residues of the symmetrically related chain A are shown in yellow, with those residues within 5 Å of the tag shown in cyan. The green electron density corresponds to an omit map with the octapeptide omitted (contoured at 3σ). The cyclic compound X3E, which was presumably carried over from the protein expression and purification process, is seen in the active site, and the black electron density corresponds to a 2Fo − Fc map (contoured at 1σ). The two Zn2+ ions are shown as magenta spheres. |
![[Figure 6]](nj5323fig6.jpg)
 | STRUCTURAL BIOLOGY |
ISSN: 2059-7983
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