FIG. 1.

Proposed secondary structure of ERAV RNA downstream from the poly(C) tract. Major structural domains are labeled according to the work of Palmenberg and Sgro (21). The four potential initiation codons are boxed, and the polypyrimidine tract is indicated by the dashed line. The positions of oligonucleotides used in several experiments described below are indicated (arrows). Shaded boxes highlight predicted unpaired sequences that are conserved in the cardiovirus and aphthovirus genomes. The position of the functionally relevant GNRA loop is indicated by the asterisk. Numbering begins at the first base after the poly(C) tract.