Figure 3

Random walk graph kernel An example of the graph matching conducted by the random walk graph kernel. Similarly colored vertices are sequence homologous according to a BLAST search. As can be seen from the figure, the graph kernel compares the neighborhood around the starting vertices in each graph using random walks (taking into account the weights of the edges, if available). Colored edges indicate matching random walks across the two graphs of up to length 2. The random walk graph kernel takes into account the sequence homology of the vertices visited in the random walks across the two graphs as well as the general topology of the neighborhood around the starting vertex.