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Figure 3.
Fig. 3. (A) Topology diagram of the [2Fe-2S]-containing FS2
domain in a side-by-side comparison with the [2Fe-2S] ferredoxin
from Chorella fusca. The proteins are shown from the same
relative perspective, with the FS2 domain shown in purple and
the C. fusca ferredoxin shown in orange. The [2Fe-2S] cluster is
shown as a space-filling model (colors as in Fig. 1A). (B)
Topology diagram of the 2-[4Fe-4S]-containing FS4A-FS4B domain
in a side-by-side comparison with the 2-[4Fe-4S] ferredoxin from
Chromatium vinosum. The proteins are shown from the same
relative perspective, with the FS4A-FS4B domain shown in green
and the C. vinosum ferredoxin shown in orange. The [4Fe-4S]
clusters are shown as space-filling models. (C) Topology diagram
of the [4Fe-4S]-containing FS4C domain, showing the location and
composition of the four coordinating ligands His94, Cys98,
Cys101, and Cys107.
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