Schematic maps of (a) pLK75 and (b) pLK78.

The black blocks on the outer circle are the coding DNA sequences of the positive strand, and the black blocks on the inner circle are the coding DNA sequences of the negative strand. The remarkable features are indicated. Consensus regions similar to other plasmids/replicons are marked with thick black lines inside the circles, with non-consensus sections between the conserved regions shown by thin lines. The 26-kb inversion regions are marked in the inner circles, and the flanking sequences are shown. The sequences at both ends of the inversion region are shown in bold. The positions of the 244-bp Tn3-like repeats (c) are marked by black arrowheads on the circles. The 244-bp repeat sequence is shown in (c). The putative inverted repeats flanking this sequence are shown in bold with an underline.