J Mol Evol. 2003 Nov;57(5):574-87 doi: 10.1007/s00239-003-2511-9

Yokobori S, Watanabe Y, Oshima T.

Mitochondrial genome of Ciona savignyi (Urochordata, Ascidiacea, Enterogona): comparison of gene arrangement and tRNA genes with Halocynthia roretzi mitochondrial genome.

The DDBJ accession number of complete nucleotide sequence of the Ciona mtDNA is AB079784.

“The atp8 gene is absent.” “The Ciona mt genome uses the same codon table as the Halocynthia mt genome: AUA specifies Met, UGA specifies Trp, and AGA/AGG specify Gly.” “To predict the genetic code used in the Ciona mt genome, the well-conserved cox1 sequence was compared between Ciona and several other metazoans.” “The Ciona mtDNA is extremely (77.3%) AT-rich.”