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Table 2 Human PPI data coverage overlap (in %) among its constituent database sources

From: HAPPI-2: a Comprehensive and High-quality Map of Human Annotated and Predicted Protein Interactions

  HPRD I2d IntNetDB Wang BioGRID STRING
HPRD 100.00 67.21 1.13 14.38 41.34 58.56
I2d 15.50 100.00 1.49 5.78 26.00 38.42
IntNetDB 0.10 1.15 100.00 0.45 0.97 16.19
Wang 16.03 27.95 2.80 100.00 24.87 92.33
BioGRID 10.29 28.06 1.36 5.55 100.00 43.01
STRING 0.15 0.42 0.23 0.21 0.44 100.00
  1. The percentage number are the overlapping count between the two data sources at the intersection of row and column divided by the size of data source for the row