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Non-canonical initiation translation mechanisms used by plant RNA viruses. Canonical translation of eukaryotic mRNAs is shown in the top. Non-canonical translation elements are grouped depending on their location in viral genome and are color-coded to match with the virus acronyms. Lighter-shaded loops in the secondary structure of 3′-CITEs indicated sequences known or predicted to base-pair to the 5′ end of the viral genome (shown as dashed line).
