Nuphar advena encodes three phage-type RNA polymerases. Schematic representation of the three NaRpoT genes. Coding (black) and non-coding (gray) regions are specified on the genomic sequences. Corresponding cDNA sequences, comprising the complete RpoT reading frames, are shown next to the genomic sequences. Positions of start (ATG, CTG, see text) and stop codons (TAA, TGA), as well as the length of derived polypeptides are indicated for cDNAs.