Figure 3.
Putative modes of accessing milk glycans in the infant gut by bifidobacteria. B. longum subsp. infantis captures intact HMO, while B. bifidum secretes extracellular enzymes prior to translocating lacto-N-biose degradation products. B. breve utilizes HMO monosaccharides cleaved by extracellular enzymes secreted by heterologous members of the consortium.