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Degree distributions of HDFs on a log-log scale. P(k) is the fraction of nodes with degree k. A: Only connections of HDFs to HIV proteins. B: Only HDF-HDF connections. Both distributions were fitted with a power law (P(k) = k-γ) with A: γ = 2.3, and B: γ = 2.3, showing the scale-free nature of both networks.
