I know someone who was using graph algorithims to study biological phonomena. Given a set of correlations, say, Protein A correlates significantly with Protein

I know someone who was using graph algorithims to study biological phonomena. Given a set of correlations, say, Protein A correlates significantly with Protein B, but inversely proportional to Protein C, what is the minimal graph that describes the relationships among Proteins A, B, and C? The bioinformatics folks apparently have been doing this for a while now. What will be interesting is how the presence of tunnels affect these analysis, or better yet, whether mining the data would reveal the presence of the tunnelling nanotubes.