Length polymorphism and structural organization of the A+T-rich region of mitochondrial DNA in Antheraea pernyi (Lepidoptera: Saturniidae)

► We evidence the presence of a length polymorphism in the A. pernyi A+T-rich region. ► We show a small degree of nucleotide differences in the A. pernyi A+T-rich region. ► We examine the conserved structural elements in the A. pernyi A+T-rich region. ► No universal models of structure-function relations in the insect A+T-rich region.