Status	Description	Organism	Genes	References
	ribonucleoside-diphosphate reductase, beta subunit	Caulobacter crescentus	nrdB
	ribonucleotide reductase-related protein	Caulobacter crescentus	CC1889
	ribonucleoside-diphosphate reductase, alpha subunit	Caulobacter crescentus	nrdA