Fig. 2

All possible DCJs that move one genome closer to the other. Adjacency edges are contracted, so that only the cross edges are shown in the connected components. Endpoints that are affected by the DCJ are circled. In the top row, extracting a cycle from (a) an even-length path, (b) an odd-length path, and (c) a cycle are depicted. Even-length paths can be combined to form two odd-length paths if one of the paths has endpoints in genome A and the other in genome B, as depicted in (d). An even-length path can be split into two odd length paths if the split is done in the genome with fewer vertices in the path, as depicted in (e)