Table 1 Number of binary protein–protein interactions for selected model organisms present in the IMEx dataset, May 2020.

Human–human (non-redundant)

490,061/521,353 (259,962/278,983)

Human–mouse

29,510/31,478

Human–any mammal^a

526,772/561,062

Human–bacteria

10,720/10,800

Human–virus

21,480/22,811

Mouse–any mammal

51,578/80,230

Rat–any mammal

11,236/14,105

Drosophila melanogaster–Drosophila melanogaster

48,067/51,741

Caenorhabditis elegans–Caenorhabditis elegans

12,526/16,970

Arabidopsis thaliana–Arabidopsis thaliana

52,131/55,661

Saccharomyces cerevisiae–Saccharomyces cerevisiae

72,227/132,104

Escherichia coli–Escherichia coli

19,318/28,513