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Table 2 Network global properties of all PPINs and the null network

From: A systematic survey of centrality measures for protein-protein interaction networks

Networks Properties Nodes Edges Connected Components Nodes/giant component Edges/Giant Component Density Diameter α value (Power Law) r value (Power Law) Average Clustering Coefficent Heterogeneity Network Centralization
Homology 2479 7545 648 115 2813 0.43 5 0.01 0.00 0.64 0.47 0.34
Cooccurence 1221 3275 209 425 1653 0.02 22 1.07 0.61 0.47 1.02 0.06
Fusion 1187 1408 222 437 789 0.01 26 1.76 0.91 0.07 1.00 0.05
Database_transferred 622 2975 10 583 2930 0.02 9 1.23 0.69 0.36 0.86 0.06
Neighborhood_transferred 2004 71,236 1 2004 71,236 0.04 6 0.91 0.72 0.26 1.04 0.41
Database 2496 27,766 100 2058 26,574 0.01 20 1.18 0.56 0.69 1.07 0.06
Coexpression_transferred 3614 168,368 4 3607 168,364 0.03 8 0.96 0.79 0.35 1.39 0.26
Experiments_transferred 3870 163,403 1 3870 163,403 0.02 6 1.03 0.81 0.35 1.59 0.77
Textmining_transferred 4207 364,816 1 4207 364,816 0.04 6 0.88 0.75 0.32 1.09 0.30
Coexpression 5310 195,676 27 5254 195,643 0.01 15 1.08 0.82 0.44 1.56 0.11
Textmining 5896 379,341 1 5896 379,341 0.02 5 1.01 0.66 0.30 0.92 0.35
Experiments 6026 211,613 2 6024 211,612 0.01 6 1.22 0.82 0.19 1.54 0.56
Combined_score 6294 911,414 2 6292 911,413 0.05 7 0.76 0.63 0.27 0.90 0.62
Erdős_Rényi 6292 911,413 1 6292 911,413 0.05 3 _1.095 0.01 0.05 0.06 0.01