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. 2014 Oct 9;9(10):e109987. doi: 10.1371/journal.pone.0109987

Figure 1. Error thresholds of secondary structure classes (SSCs).

Figure 1

The graphs depict the critical per digit replication accuracies (error thresholds) as a function of the frequency of sequences belonging to an SSC among all possible structures of Inline graphic (left) and Inline graphic (right). Open circles represent individual SSCs, solid circles represent super-SSCs (SSSC) that merge structures that only differ in the flanking single-stranded regions. Only SSCs are included that cover at least 0.1% of the total sequence space.