FIG. 1.

Transcriptional map of FIV. A schematic representation of the FIV genome is shown at the top. The exon structure and locations of splice donor (SD) and splice acceptor (SA) sites were determined by sequencing the PCR-amplified cDNAs. The arrows represent locations and orientations of the oligonucleotide primers used in this study. The viral transcripts are deduced from the sequence of the cDNA clones. Each transcript is designated by its exon composition. Transcripts 1.3.5 and 1.2.3.5 are newly described in this study.