Status	Description	Organism	Genes	References
	possible CMP-sialic acid synthetase, NeuA	Fusobacterium nucleatum	GMHS-86
	CMP-sialic acid synthetase	Idiomarina loihiensis	GI0U-524
	CMP-sialic acid synthetase, NeuA	Methanobrevibacter smithii	GHWZ-1576