Overlap of human PPIs in six PPI databases. (a) Pairwise overlaps of PPIs across databases are shown in cells. The number of nonredundant PPIs is shown in parentheses for each database. (b) Overlaps of PPIs shared in common in one, two, three, four, five, and six databases are shown.
Kikugawa et al. BMC Systems Biology 2012 6(Suppl 2):S7 doi:10.1186/1752-0509-6-S2-S7