Erratum to: J Mol Evol DOI 10.1007/s00239-011-9440-9

The paper was published erroneously with error in Appendix tables, values of CL were erroneously inverted. Corrected tables are given overleaf.

Table 9 Top 50 stable DH structures in actual tRNA sequences
Table 10 Top 50 stable CI structures in actual tRNA sequences