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Figure 3 | BMC Evolutionary Biology

Figure 3

From: Evolutionary cores of domain co-occurrence networks

Figure 3

Statistics of the domain interaction network of Yeast. The domain interaction network has an average node connectivity of ⟨k⟩ = 16.9 along with a reasonably high degree of clustering ⟨C⟩ = 0.34. (a) The degree distribution of the domain interaction network displays a power-law, following the generalized Zipf-law P(k) = α(β + k)-γwhere α = 3,406.4, β = 67.4 and γ = 2.3. The network's inherent modularity is suggested by the presence of a power-law dependence in the average clustering coefficient ⟨C⟩ ~ k-β(inset), where β = 0.5. (b) The average strength s i of each interaction domain i displays a power-law (s i (k i ) ~ ) over four decades. Obviously, this is an effect of a domains level of interaction, since we only recover a weak decrease of the strength s i toward higher degree k i , s i ~ k-0.1.

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