Figure 1
From: Complete mitochondrial genome sequence of Urechis caupo, a representative of the phylum Echiura
Mitochondrial gene map of the echiuran Urechis caupo. All genes are transcribed from the same DNA strand. Scaling is only approximate. Genes are designated by standard nomenclature except for tRNAs, which are identified only by the one-letter code for the corresponding amino acid, with the two serine and two leucine tRNAs differentiated by numeral as identified in Fig. 3. "nc" indicates the largest non-coding regions; it may be that transcription initiates here, but this is not known.