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. 2009 May 13;420(Pt 2):221–227. doi: 10.1042/BJ20090110

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© 2009 The Author(s) The author(s) has paid for this article to be freely available under the terms of the Creative Commons Attribution Non-Commercial Licence (http://creativecommons.org/licenses/by-nc/2.5/) which permits unrestricted non-commercial use, distribution and reproduction in any medium, provided the original work is properly cited.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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(A) Stereo view of GlcNAcstatin D (sticks with green carbon, red oxygen and blue nitrogen atoms) in the active site of CpOGA (sticks with grey carbon). Hydrogen bonds are indicated by black broken lines. Unbiased |F_o|–|F_c|, ϕ_calc electron density map (2.75 σ) is shown as a cyan chickenwire. (B) Stereo view of superimposed crystallographically determined complexes of CpOGA with GlcNAcstatin C (PDB number 2J62) (colour scheme as in A) and PUGNAc (PDB number 2CBJ) (sticks with light blue carbon), black broken lines showing hydrogen bonds for the CpOGA–GlcNAcstatin complex.