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Arterivirus GL envelope glycoprotein Arteriviruses encode 4 envelope proteins, Gl, Gs, M and N. Gl envelope protein, is encoded in ORF5, and is 30- 45 kDa in size. Gl is heterogenously glycosylated with N-acetyllactosamine in a cell-type-specific manner. The Gl glycoprotein expresses the neutralization determinants.
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