FIG. 1.

Genome organization of the ilarviruses. (A) Diagram of the three triplet codon phases of plus-strand RNA 2 of the four ilarviruses. The AUG triplet and the three stop codons are shown as short and long vertical lines, respectively. (B) SpLV genome organization. Proteins 1a, 2a, and 3a are translated from genomic RNAs 1, 2, and 3, while the CP and the 2b protein are translated via subgenomic RNAs 4 and 4A. The open box represents the highly conserved 3′-terminal sequence of 163 nucleotides (nt). The target positions of the two probes (a and b) used in Northern blot analysis, as well as the approximate binding position of primer Xin-44 (arrows), are indicated. K, 10³.