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. 2023 Oct 4;47(6):fuad056. doi: 10.1093/femsre/fuad056

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© The Author(s) 2023. Published by Oxford University Press on behalf of FEMS.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 1. — HMO structures found in human milk. Structures of the core human milk oligosaccharides (HMOs) found in human milk including linkages of HMO building blocks and the glycoyl hydrolase enzymes which act to degrade HMOs. Legend for the monosaccharide constituents of HMOs on the top and glycosyl hydrolases on the bottom left. HMO and HMO components shown include Lac: lactose; LacNAc: N-acetyllactosamine; LNB: lacto-N-biose; LNT: lacto-N-tetraose; LNnT: lacto-N-neotetraose; LNFPI: lacto-N-fucopentaose-I; DFL: difucosyllactose; 2’-FL: 2’ fucosyllactose; 3-FL: 3-fucosyllactose; 3’-SL: 3’sialyllactose; 6’-SL: 6’sialyllactose.