Figure 2.

 Sequence of the ss cDNAs. The sequence and conceptual translation of the ss cDNA sscA6 is shown, along with the polymorphisms associated with the sscA5 cDNA. The nucleotide sequence is numbered by plain text at the end of each row; the corresponding amino acid sequence numbering is depicted in boldface type. Downward-pointing arrows indicate the ends of the sscA5 cDNA; broken lines above nucleotides +1789 through +1797 indicate the three codons absent in the sscA5 cDNA. The bHLH region is double underlined; the PAS domain is single underlined. The translation stop is noted by an asterisk. The positions of the seven exon splice junctions are in lowercase text; the donor and splice acceptors are italicized; the three flanking intronic nucleotides are in plain text. The approximate length of each intron is in parentheses, and those splice sites conserved in Ahr or sim are noted by a bold A and s, respectively.