3PVD:
reference: Crystallography of a Lewis-binding norovirus, elucidation of strain-specificity to the polymorphic human histo-blood group antigens., Chen Y, Tan M, Xia M, Hao N, Zhang XC, Huang P, Jiang X, Li X, Rao Z, PLoS Pathog. 2011 Jul;7(7):e1002152. Epub 2011 Jul 21. PMID: 21811409

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