Figure 1

Mitochondrial genome organization of Limulus polyphemus , Steganacarus magnus and two Leptotrombidium species. Arrows indicate gene rearrangements (translocations, inversions and loss). Underlined genes and tRNAs with letters below are encoded in the opposite strand. Shaded boxes indicate shared gene boundaries between S. magnus and Leptotrombidium. Gene abbreviations: cox1–3: cytochrome oxidase subunits 1–3; atp6,8: ATP synthase subunit 6,8; nad1–6, 4L: NADH dehydrogenase subunit 1–6, 4L; cob: cytochrome b; rrnL: large ribosomal subunit; rrnS: small ribosomal subunit; LNR: large non-coding control region. tRNA genes are symbolised by the one-letter code of their amino acid: I = Isoleucine; Q = Glutamine; M = Methione; W = Tryptophane; C = Cysteine; Y = Tyrosine; K = Lysine; D = Aspartate; G = Glycine; A = Alanine; R = Arginine; N = Asparagine; S = Serine; E = Glutamate; F = Phenylalanine; H = Histidine; T = Threonine; P = Proline; L = Leucine; V = Valine.