%0 Journal Article %T RNA 3-dimensional structural motifs as a critical constraint of viroid RNA evolution %A Biao Ding %A Craig L. Zirbel %A Neocles B. Leontis %A Ying Wang %J - %D 2018 %R 10.1371/journal.ppat.1006801 %K RNA structure %K Sequence motif analysis %K Viroids %K RNA viruses %K Non-coding RNA sequences %K Viral replication %K Viral evolution %K Viral structure %U https://journals.plos.org/plospathogens/article?id=10.1371/journal.ppat.1006801