Low Rates of Lateral Gene Transfer among Metabolic Genes Define the Evolving Biogeochemical Niches of Archaea through Deep Time
Figure 12
Nitrogen fixation. Phylogenetic trees for (a) nitrogenase reductase NifH and NifH-like proteins (type 4) and (b) the nitrogenase alpha subunit NifD with the FeMo cofactor subunit NifE.
(a) Nitrogenase reductase NifH, and NifH-like proteins
(b) Nitrogenase NifD and FeMo cofactor subunit NifE