FIG. 6.

Microvariants of the 35S RNA leader found in the offspring of different sORF mutants. Nucleotide substitutions, deletions, and insertions are in lowercase letters and are indicated by thin arrows on the hairpinlike structure (disrupted in stem section 3 for the sake of compactness). A bent thick arrow shows the position of the ORF VII start codon; the CaMV PBS is underlined. The contiguous sequence of the CaMV 35S RNA promoter is shown at the bottom; the annealing site of PCR primer 1 is indicated. The start codons of sORFs are indicated in boldface and also by uppercase italic letters (A to F). Dotted arrows show a 10-nt CT repeat. PAS, polyadenylation signal.