... Clockwise from 9 o'clock: c.1.4, FMN-linked oxidoreductases; c.3.1, FAD/
NAD(P)-binding domain; d.58.1, 4Fe-4S ferredoxins; d.15.4, 2Fe-2S ferredoxin-like; d.145.1, FAD-binding domain; a.3.1, Cytochrome c; b.1.1,...
http://www.biomedcentral.com/1471-2105/4/45/figure/F7