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Polypeptide chains included in the truncated rigid-body models are shown in cyan (residues 72 to 209 and 230 to 272 of VP1), yellow (residues 72 to 265 of VP2), or red (residues 1 to 12 and 50 to 227 of VP3). Residues omitted from the model are dark blue and are labeled. The narrow end of each beta-barrel is on the top (VP1) or left (VP2 and VP3), and the wide end is opposite.
