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. Author manuscript; available in PMC: 2015 Jan 21.
Published in final edited form as: Chem Soc Rev. 2014 Jan 21;43(2):676–706. doi: 10.1039/c3cs60249d

Fig. 4.

Fig. 4

(A) The pyranopterin cofactor attached to the dinucleotide as found in bacterial nitrate reductases; (B) the basic pyranopterin cofactor found in all nitrate reductases; (C) the ring open form of the cofactor found in the structures of respiratory nitrate reductase, Nar.