Fig. 1

Scheme of a contact map and associated contact network. a Each axis represents the linear position along the genome. A black pixel (i,j) and the symmetric pixel (j,i) correspond to a contact between the genomic sites i and j, each defined at a resolution of a few kbs, depending on the experimental protocol and possibly on a coarse-graining achieved in processing the raw data. b Considering the contact map as an adjacency matrix defines the contact network, whose nodes are the genomic sites. One contact and the corresponding undirected edge are underlined in red. The node labels are prescribed by the linear ordering along the genome