Figure 1
From: New challenges for text mining: mapping between text and manually curated pathways
The distribution of distances between the nodes. The pair of nodes which is directly linked in the PPI network (all distances between the nodes are 1) seem to be associated through a sequences of links. The links in the PPI network corresponding to the different types of events show distinctly different distribution behaviours in terms of the length of corresponding paths in the pathway. The distance between nodes in the binding event tends to be close to 1, while the distance between nodes in the positive regulation tends to be distributed widely.