Abstract
The complete mitochondrial genome of the Spadenose shark Scoliodon laticaudus has been determined for the first time in this study. It was 16,695 bp in length and consisted of 37 genes with typical gene order in vertebrate mitogenome. The nucleotide base content of S. laticaudus mitogenome was 31.5% A, 23.7% C, 13.2% G and 31.6% T. Two start codons (GTG and ATG) and three stop codons (AGA, TAG and TAA/T) were used in the protein-coding genes. The 22 tRNAs ranged from 67 bp (tRNA-Cys and tRNA-Ser2) to 75 bp (tRNA-Leu1) in length. The tRNA-Ser2 could not be folded into typical cloverleaf secondary structure by lacking the dihydrouridine (DHC) arm stem.
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