Figure 5From: Metabolic engineering of microbes for oligosaccharide and polysaccharide synthesisMetabolic pathway for CMP-NeuAc synthesis from NeuAc and orotic acid [14]. Enzymes – 1: CMP-NeuAc synthetase (NeuA), 2: α2,3-sialyltransferase, 3: CTP synthetase (PyrG).Back to article page