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. Author manuscript; available in PMC: 2013 Jan 18.
Published in final edited form as: J Am Chem Soc. 2011 Dec 29;134(2):999–1009. doi: 10.1021/ja207173p

Figure 1.

Figure 1

Cofactor arrangements in xanthine oxidoreductase. The 423-433 loops in the neighborhood of the flavin binding sites are depicted as pink (XDH) and green (XO) threads, respectively.