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Nitrite reductase (1aoq) from Paracoccus denitrificans

• What structural elements are present?
• What is the subunit composition of the proteins?
• What are the major features of the active site?
• What is the distance between heme centers?
• Which heme centers are bound by substrate or product?

Williams, P. A., V. Fulop, E. F. Garman, N. F. Saunders, S. J. Ferguson, and J. Hajdu. 1997. Haem-ligand switching during catalysis in crystals of a nitrogen-cycle enzyme. Nature 389:406-412.

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