Figure 2.

(A) Sequence of the ΔLF promoter region and unique 5′ end region of the ΔLF mRNA (exon 1β). In the promoter region, the putative TATA box is boxed. Consensus sequences for transcription factors and regulatory elements are underlined and noted. In exon 1β, the ATG, a stop codon, and the beginning of exon 2 of the LF gene are indicated. (B) Sequence of the exon/intron boundary sequences of the LF gene. (Upper sequence) Last 18 nts of exon 1β followed by the immediate genomic sequence. (Lower sequence) Genomic sequence immediately upstream from exon 2 of the LF gene followed by the beginning sequence of exon 2. The invariant dinucleotide splicing junctions are underlined.