Nucleotide sequence of Psr2 cDNA [Genbank: DQ351288] with translation of coding region. The I-helix (red), heme-binding (blue) region, and two potential polyadenylation signals (green) are underlined. Processing sites for polyadenylation are indicated by arrows. The sequence of the longest cDNA obtained is shown; other cDNAs exhibited polyadenylation at the first arrow. The stop codon is marked with an asterisk. In addition, two nonsense codons upstream from the initiating ATG are indicated by dots. The cDNA sequence obtained by DD is boldface.