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Figure 1.
Fig. 1. Overall structure of nitrite reductase. A, front
view of the dimer of W. succinogenes cytochrome c nitrite
reductase. One monomer forms the asymmetric unit of the
crystals. Dimer formation is mediated by the central helical
segments. B, the arrangement of heme groups in the same
orientation as in A. In the left monomer, hemes are numbered
according to their attachment to the protein chain. In the right
monomer, distances are given between the iron atoms. Images were
produced with Molscript (32) and Raster3D (33).
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