Fig 1.
Arrangement of nitrogenase gene clusters in the genome of M. acetivorans. (A) nif; Mo-nitrogenase, (B) vnf; V-nitrogenase, (C) anf; Fe-nitrogenase. Locus tags: nifHI1I2DKEN (ma3895-3901), vnfHI1I2DGKENX (ma1213-1221), anfI1I2DKEN (ma1212-1205). Black arrows: nitrogenase subunits, diagonal striped arrows: cofactor assembly proteins, dotted arrows: regulatory proteins and vertical striped arrows: unknown function. (D) The vnf and anf gene clusters are opposite each other in the chromosome as shown.