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Iron content and molecular size of Roseiflexus Nif proteins
| Nif protein | Fe atoms/molecule of protein | Molecular size (kDa) |
Quaternary structure |
|---|---|---|---|
| apo-NifDKRS | 212 | Heterotetramer | |
| with iscEc cluster | 14.2 ± 1.0 | ||
| with nifUSAv | 16.6 ± 0.8 | ||
| NifHRS (with iscEc cluster) | 3.7 ± 0.9 | 52 | Homodimer |
| NifBRS (with nifUSAv) | 8.2 ± 2.6 | 32 | Monomer |
Fe content data are the mean ± SD of independent purifications (n = 2 for apo-NifDKRS with iscEc and n = 4 for the rest).
