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. Author manuscript; available in PMC: 2013 Dec 18.
Published in final edited form as: Nature. 2006 Nov 26;444(7121):10.1038/nature05363. doi: 10.1038/nature05363

Figure 3. The active site of CPSF-73.

Figure 3

a, The zinc binding site for human CPSF-73. The motifs are labeled, and the bridging hydroxide ion is shown as a red sphere. Liganding interactions are indicated in thin magenta lines, and hydrogen-bonding interactions in thin red lines. The arrow indicates the nucleophilic attack from the hydroxide ion. b, The zinc binding site in L1 metallo-β-lactamase17.