FIG. 2.

Nucleotide sequence of the vIRF promoter region. The sequence was taken from GenBank KSU75698, nt 86073 to 85207 (48). The boldface letters ATG represent the vIRF translation start codon. The TATA element is indicated in boldface type and boxed. Four potential AP-1 sites and two potential SP-1 sites are boxed. The putative minor and major transcription start sites are indicated with arrows. One of the major transcription start sites was defined as the first nucleotide, based on the results of both 5′-RACE and primer extension. In addition, a conserved cap site and an initiator element flanking the minor transcription start site are indicated.