1887

Abstract

The 5′ termini of linear forms of avocado sunblotch viroid (ASBVd) isolated from infected tissue have been determined by primer extension analyses. According to the different termini identified, four main populations of linear viroid molecules were found. One of them had the same 5′ end as the one produced in the self-cleavage reaction of ASBVd dimeric transcripts mediated by a hammerhead structure, suggesting a possible involvement of this reaction in the replication mechanism of ASBVd.

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1993-05-01
2024-04-19
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