Assymmetric rolling circle replication

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Related to: Pospiviroidae

Location: Host cell nucleus.

Replication events: Pospoviroids replicate their genome through rolling circle by a host RNA polymerase that generate linear multimers from circular RNA template. The linear multimeric (-) antigenome is directly replicated into multimeric (+) genome. These multimers are subsequently cleaved to unit-length RNAs by host RNAse. This replication is called "assymmetric replication" since only plus strands are circularized