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Plant potyvirus RNAs have a virus protein covalently attached at their 5′-end: the VPg (virus protein genome-linked). In part because of its position at the 5′end of the virus RNA, the VPg has been speculated to play a role in virus translation and replication. We report that the VPg of Turnip mosaic virus (TuMV) interacts with, and does not disrupt, the translation initiation complex eIF(iso)4E-eIF(iso)4G...