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Fig. 2 | Microbial Cell Factories

Fig. 2

From: Gold standard for nutrition: a review of human milk oligosaccharide and its effects on infant gut microbiota

Fig. 2

Four phenotypes of FucOS were produced by Se and Le genes [41, 44]. Se and Le genes play an important role in determining the composition of FucOS [34]. FUT2 is encoded by the first gene whereas FUT3 is encoded by the second one [40,41,42,43]. According to the activation state of genes, mothers can be classified as either positive (+) or negative (−) for both genes, where 70% are Se(+)Le(+), 20% Se(−)Le(+), 9% Se(+)Le(−), and 1% Se(−)Le(−) [36, 45,46,47], and phenotypes to production of FucOS and main FucOS synthesized are showed

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