The Complete mitochondrial genome of the Longnose skate: Raja rhina (Rajiformes,Rajidae)

Abstract

The complete sequence of mitochondrial DNA of a longnose skate, Raja rhina wasdetermined for the first time. It is 16, 910 bp in length containing 2 rRNA, 22 tRNA and 13protein coding genes with the same gene order and structure as those of other Rajidae species.The nucleotide of L-strand is composed of 30.1% A, 27.2% C, 28.5% T, and 14.2% G,showing a slight A+T bias. The G is the least used base and markedly lower at the third codonposition (5.4%). Twelve of the 13 protein coding genes use ATG as their start codon while theCOX1 starts with GTG. As for stop codon, only ND4 shows incomplete stop codon TA. Thismitogenome is the first report for a species of the genus Raja, and providing a valuableresource of genetic information for understanding the phylogenetic relationship and theevolution of the genus Raja as well as the family, Rajidae.e of other Rajidae species.The nucleotide of L-strand is composed of 30.1% A, 27.2% C, 28.5% T, and 14.2% G,showing a slight A+T bias. The G is the least used base and markedly lower at the third codonposition (5.4%). Twelve of the 13 protein coding genes use ATG as their start codon while theCOX1 starts with GTG. As for stop codon, only ND4 shows incomplete stop codon TA. Thismitogenome is the first report for a species of the genus Raja, and providing a valuableresource of genetic information for understanding the phylogenetic relationship and theevolution of the genus Raja as well as the family, Rajidae.