Define a function C(k) to return the mean clustering coefficient of nodes that have degree k. For metabolic networks of 43 organisms, C(k) is approxi-mately proportional to so that as the degree increases, the clustering co-efficient decreases. Thus, nodes with small degrees tend to be clustered densely, and nodes with large degrees are not (Mason and Verwoerd 2007). Does your data set exhibit a similar attribute?