2Fe-2S ferredoxin-type domain (aa 5-81) (according to UniProt)

4Fe-4S His(Cys)3-ligated-type domain (aa 81-121) (according to UniProt)

2 [SW|4Fe-4S ferredoxin-type domain]s (aa 144-171, aa 187-216) (according to UniProt)

[SW|4Fe-4S Mo/W bis-MGD-type domain] (aa 263-319) (according to UniProt)