Jaccard index J(S1, S2) as function of node subsets of s-core+ sequence S1 and S2 consisting of their m respective innermost nodes, for: (a) Human all-tissues and brain, (b) mouse all-tissues and brain, (c) human and mouse all-tissues and (d) human and mouse brain network comparisons.

The dashed lines are the expectation value for J(m; S1, S2). Both within-species comparisons show large J-values for small m, while the within-species comparisons have a lesser extent of innermost core overlap.