Predicted thermodynamically optimal secondary structures
of PSTVd strains used for infection (boxed) and resulting mutants
found in this study.
Nucleotides differing from strain Intermediate
(1) are given in red. Structure predictions were performed
with RNAfold version 1.6.1 (2) at 37°C.
Next to the strain or mutant name is given the calculated free
energy ΔG°(37°C) of the structure.