1.9.6.1 Fe contains 2.7 mol iron (of which 1.4 mol is presumably non-haem iron) per mol of protein (assuming a 110000 Da molecular mass) 697696 1.9.6.1 Fe NapA contains a [4Fe-4S] cluster 674891 1.9.6.1 Fe subunit NapA is an 90000 Da catalytic subunit which binds a bis-molybdenum guanosine dinucleoside cofactor and a [4Fe4S] cluster 654561 1.9.6.1 Fe2+ - 741478 1.9.6.1 Fe2+ in the cofactor heme and the [4Fe-4S] cluster 742486 1.9.6.1 Fe2+ in the heme/cytochrome cofactor 742319, 742648 1.9.6.1 Iron contains iron 395176 1.9.6.1 Iron Fe:Mo ratio is slightly higher than the theoretical value of 4:1 764685 1.9.6.1 Iron relative metal content is around 1 Mo atom to 6 Fe atoms 764214 1.9.6.1 Mo contains molybdenum, 0.9 mol molybdenum: 1 mol protein (assuminga 110000 Da molecular mass) 697696