3AST:
reference: Structural basis for the recognition of Lewis antigens by genogroup I norovirus., Kubota T, Kumagai A, Ito H, Furukawa S, Someya Y, Takeda N, Ishii K, Wakita T, Narimatsu H, Shirato H, J Virol. 2012 Oct;86(20):11138-50. Epub 2012 Aug 1. PMID: 22855491

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).