Annotated genes coding for some carbohydrate active enzymes in the genomes of Bacteroides fragilis ATCC25285, Bacteroides vulgatus ATCC8483, Bifidobacterium infantis ATCC15697 and Bifidobacterium longum DJO10A, as it is described at the CAZy database (http://www.cazy.org) (27). The glycoside hydrolase families (GHF) shown are potentially related to the degradation of HMOs, and they include the following activities: GH2, α-galactosidase; GH3, β-N-Acetylgalactosaminidase; GH20, β-hexosaminidase; GH27, α-N-acetylgalactosaminidase; GH29, α-L-fucosidase; GH33, sialidase; GH42, β-galactosidase; GH95, α-1,2-L-fucosidase.